• China, India, and the US have the largest active armed forces in the world.
• The International Institute for Strategic Studies compiled data about the world's militaries.
• The world's top armies spend hundreds of billions of dollars on defense each year.

The US military may lead the world in budget size and in the ambitions of its warfare technology, but there is one measure by which it is outsized by other nations.

Using data from the International Institute for Strategic Studies' 2026 Military Balance report, Business Insider ranked the top 25 countries by the size of their active armed forces during 2025 and listed their defense budgets that same year.

Active-duty force size is a tally of a country's uniformed troops: airmen, soldiers, sailors, special operators, and Marines.

Armies, in particular, depend on size to gain and occupy ground during armed conflicts.

Militaries can also be a tool of domestic repression. North Korea, for example, is one of the world's most repressive states, led by a dictator who has repeatedly threatened neighboring South Korea — and it also has one of the world's largest militaries.

The number of active-duty military personnel is far from the only factor that matters when comparing military power between countries, but it reflects latent power.

"Numbers have value, but there's a lot more to military capability," Mark Cancian, a senior advisor at the Center for Strategic and International Studies, a Washington, DC-based foreign policy and national security think tank, told Business Insider.

IISS, a London-headquartered think tank, counts active armed forces, reservists, and paramilitaries as separate categories in its analysis, showing a fuller picture of each nation's manpower.

Some countries have significantly more reservists than others — Vietnam has the largest number in the world, estimated at 5 million — but the quality and longevity of their expertise can vary between systems.

"When you look at some countries' reserve numbers, you're often looking at people who haven't trained in 10 or 20 years," Cancian said. "It gives you a big number, but their military value is questionable."

Even when accounting for all of a military's manpower, personnel is only one of the factors that can qualify a nation's military strength, which also includes equipment and readiness.

There's also the role of technologies in global warfare, the size and sophistication of air forces and naval fleets, amphibious capabilities for landing assault forces, command-and-control systems, and nuclear forces, all of which shape military power.

Still, comparing global manpower offers insight into how countries prioritize military power.

See how the world's largest militaries stack up in terms of active troop numbers.

25. Iraq

Active armed forces: 193,000

Defense budget: $12.7 billion

24. Morocco

Active armed forces: 196,000

Defense budget: $7.5 billion

23. France

Active armed forces: 204,000

Defense budget: $70 billion

22. Japan

Active armed forces: 247,000

Defense budget: $58.9 billion

21. Saudi Arabia

Active armed forces: 257,000

Defense budget: $72.5 billion

20. Sri Lanka

Active armed forces: 260,000

Defense budget: $1.4 billion

19. Colombia

Active armed forces: 285,000

Defense budget: $8.3 billion

18. Mexico

Active armed forces: 301,000

Defense budget: $11.4 billion

17. Eritrea

Active armed forces: 302,000

Defense budget: Not reported

16. Turkey

Active armed forces: 355,000

Defense budget: $21.5 billion

15. Thailand

Active armed forces: 361,000

Defense budget: $5.8 billion

14. Brazil

Active armed forces: 375,000

Defense budget: $24.2 billion

13. Indonesia

Active armed forces: 434,000

Defense budget: $15 billion

12. Egypt

Active armed forces: 439,000

Defense budget: $2.3 billion

11. Vietnam

Active armed forces: 450,000

Defense budget: $8.4 billion

10. South Korea

Active armed forces: 450,000

Defense budget: $43.8 billion

9. Ethiopia

Active armed forces: 503,000

Defense budget: $484 million

8. Iran

Active armed forces: 610,000

Defense budget: $6.1 billion

7. Pakistan

Active armed forces: 660,000

Defense budget: $10 billion

6. Ukraine

Active armed forces: 677,000

Defense budget: $44.4 billion

5. Russia

Active armed forces: 1,264,000

Defense budget: $161.2 billion

4. North Korea

Active armed forces: 1,280,000

Defense budget: Not reported

3. United States

Active armed forces: 1,340,000

Defense budget: $921 billion

2. India

Active armed forces: 1,501,000

Defense budget: $78.3 billion

1. China

Active armed forces: 2,035,000

Defense budget: $251.3 billion

• Ukraine has been waiting nearly a month for the US to sign off on crucial missile interceptors, its president says.
• Kyiv said it is specifically waiting for the Pentagon to approve Patriot and NASAMS missiles.
• Ukraine has repeatedly faced low stockpiles of interceptors as it defends against Russian missiles.

Kyiv has been waiting nearly a month for US Defense Secretary Pete Hegseth to sign off on crucial missile interceptors, Ukrainian President Volodymyr Zelenskyy said on Monday.

Zelenskyy said Ukraine has been waiting on approval to procure interceptors for its Patriot and NASAMS systems. The former is the country's most reliable defense against Russian ballistic missiles.

The Ukrainian president said that he instructed his team "to raise this with the American side once again. Conversations with other countries are also ongoing."

Most of the interceptors for Ukraine's air defense systems, including its Patriot batteries, are supplied through NATO's Prioritised Ukraine Requirements List (PURL) initiative, in which allies and partners buy weapons from the US and then transfer them to Kyiv.

It is unclear how many interceptors have been held up, or why Hegseth had not signed off on their transfer.

A senior Pentagon official told Business Insider "there has been no change" to department policy "regarding intelligence sharing or any capabilities we are enabling Europeans to provide to Ukraine."

The PURL initiative "continues unaltered," the official added.

Ukraine has faced repeated interceptor shortages, making it difficult to effectively defend against worsening Russian ballistic missile attacks, which, alongside armed jet-powered drones, have hammered Kyiv in a series of deadly bombardments.

The American-made MIM-104 Patriot surface-to-air missile system is a key piece of Kyiv's defensive umbrella. Ukrainian officials have urged the US and European allies to send more interceptors — PAC-2 and PAC-3 models in particular. Global munitions stockpiles, however, are under increased strain.

"We are working on several tracks — with the United States, Europe, and other partners that have stocks of PAC-2 and PAC-3 missiles," Zelenskyy said Monday in a social media post.

The Iran war has put tremendous stress on munition stockpiles. Col. Yurii Ihnat, a spokesperson for the Ukrainian Air Force, said on Monday that the Patriot interceptors fired by the US and its Middle East allies during the Iran war could have supported Kyiv's defenses for several years.

The NASAMS (National Advanced Surface-to-Air Missile System) — a joint US-Norwegian project — is another important element of Ukraine's air defense network. It is not designed to engage ballistic missiles like the Patriot, but rather short- and medium-range targets such as aircraft, cruise missiles, and drones.

Zelenskyy's comment comes amid broader tensions between Ukraine and the US, which have escalated in recent weeks.

The Trump administration has publicly denounced Ukrainian drone strikes targeting Russian energy facilities, with Washington blaming Kyiv for high oil and diesel prices. Industry experts, however, have identified the Iran war as a major source of disruption in global markets.

In October, Ukrainian officials reported multiple instances where Kyiv did not receive any advance warning of Russian ballistic missile launches from international partners through usual channels, leaving it little to no time to detect them before impact. The apparent suspension of intelligence sharing was lifted after a few days.

Ukraine also experienced a sudden disruption of its Starshield services, the military-grade version of Starlink, earlier this month, with speed caps affecting drone operations, logistics, and communication, said sources in Kyiv's defense ministry.

On Saturday, Ukrainian Defense Minister Yevhenii Khmara said that monitoring systems had recorded speed recovery for Starshield and Starlink, SpaceX's commercial satellite internet service.

The incident has raised alarms among Ukrainian officials. Elon Musk, the SpaceX CEO, accused Kyiv of breaching Starlink's terms of service by using the civilian service for drone strikes and said last weekend that this ultimately led to the disruption. Some of Kyiv's top drone advisors have pushed back on that argument.

• Elon Musk has accused Ukrainian forces of using commercial Starlink in drone strikes.
• But two Ukrainian drone figures say the claim is impossible because of limits imposed on the terminals.
• It comes after Ukraine was hit by a 10-day slowdown on Starshield, the military version of Starlink.

Ukraine said its access to Starshield was restored this weekend, but Elon Musk isn't finished with Kyiv yet.

In an X post on Sunday, Musk accused Ukrainian forces of breaching Starlink's terms of service by using the civilian platform in drone attacks.

"Ukraine military violated Starlink terms of service and used it for offensive drone strikes to kill people. That loophole was closed last week," wrote the SpaceX owner.

"Using Starlink, a civilian commercial service, for offensive drone strikes to kill people has never been allowed, nor should it be," he added.

Musk made it clear he was talking about the commercial platform and not Starshield, the military version of the satellite communications service owned and controlled by the US government.

"Were Starlink to be turned off, the Ukrainian front line would collapse immediately. This is NOT a threat, it is simply a statement of fact," Musk added.

Ukrainian drone advisors hit back

Two prominent Ukrainian drone figures, however, disputed Musk's statement, saying that it was technically impossible for any of Kyiv's troops to have independently used Starlink in drone strikes.

"As someone who was inside the process at the Ministry of Defense, I can say for sure that this is not true," wrote Serhii Sternenko, a former advisor for drones to Ukraine's defense ministry, on his Telegram channel.

"It is very strange that Elon Musk does not know about the restrictions on Starlink operation in Ukraine," wrote Serhii "Flash" Beskrestnov, another former advisor.

Both worked in the ministry in early 2026, when it negotiated with SpaceX to prevent Russia from using black-market Starlink terminals in the war. SpaceX agreed in February to block Starlink over Ukraine and Russia, allowing access only to whitelisted Ukrainian terminals.

Sternenko said that Ukrainian civilians and troops could register their terminals on the whitelist, but that these would only work while subject to a speed requirement.

For one to connect while moving, it would have to be put on a special list that uses Starshield instead, he said.

"That is, it was technically impossible to use civilian Starlink to perform missions on drones. All drone missions that required satellite communication could only be carried out using Starshield," Sternenko added.

Beskrestnov said the Ukrainian Starlink terminals were subject to a speed limit of 90 kmph, or about 55 mph. The civilian service is also completely cut off over Russia, he added.

"Thus, we physically cannot use commercial Starlink for deep strikes and middle strikes," Beskrestnov wrote.

Starshield vs Starlink

Tactical drones operating on the Ukrainian battlefield at speeds below 55 mph, such as first-person-view attack drones, typically use radio-frequency signals rather than satellite communication to maintain contact with an operator. These are also often too small and lack enough onboard power to reliably carry even a Starlink Mini terminal.

What Ukraine usually uses satellite internet for — hence its reliance on Starshield — is mid-range and deep strikes on Russia's rear or Russian territory, with larger, more powerful drones that fly much faster.

Kyiv also relies on satellite communications for its small interceptor drones, which fly at up to 265 mph to catch incoming attack drones.

Musk followed up on his Sunday X post with a screenshot of Ukrainian President Volodymyr Zelenskyy writing on social media in mid-October that Kyiv's forces "also use Starlink for mid-range strikes" against Russian targets.

However, Zelenskyy's post was describing Ukraine's recent troubles with Starshield, and he repeatedly used the term "Starlink" to refer broadly to the military satellite service instead.

Musk and SpaceX did not respond to requests for comment sent outside regular business hours by Business Insider.

Earlier this month, Ukraine raised the alarm that its access to Starshield was being throttled at high speeds, reducing its ability to conduct deeper strikes and to control interceptor drones.

The crisis lasted 10 days and came as President Donald Trump and Musk openly criticized Ukraine for targeting Russian oil facilities at a time when the White House was trying to ease fuel prices.

The Wall Street Journal reported, citing unnamed US officials and sources, that Musk had personally ordered the speed cap. Musk and Trump have separately said they were not responsible for the slowdown.

On Saturday, Zelenskyy said Starshield services were running normally again.

• The UK has issued a three-day essentials checklist it hopes its people will prepare at home.
• Top leaders say they want to bolster national resilience amid fears of the world growing more dangerous.
• The list includes items such as 9 liters of bottled water per person and charged power banks.

The UK is telling families to prepare three days' worth of food, water, and essentials amid concern that natural disasters, armed conflict, and other emergencies are becoming more frequent.

UK Prime Minister Andy Burnham's office launched the "Be Ready" campaign last week, urging British people to arrange household stockpiles including the following items:

• Three days of non-perishable food, such as dried fruit or tinned meat
• Nine liters of bottled water, or about 2.4 gallons, per person
• Hygiene and bathroom products, including wet wipes and hand sanitizer
• Warm clothing, sleeping bags, and blankets
• Light sources, such as flashlights with batteries
• A charged power bank
• An FM radio
• Cash and cards, copies of identification documents, and important information such as a note of personal medical dosages
• A first aid kit and other essential medical supplies
• Ready-made baby formula and diapers
• Pet food and bottled water

The idea is to give households the ability to hold out for three days while cut off from supplies or payment systems.

Burnham said the campaign was started as "unexpected events seem to be becoming more and more common," but urged people not to panic.

"It's about just taking sensible measures to have enough in the house to tide you over should there be a difficult situation," he told local media on Friday.

The campaign encourages people to build their stockpiles gradually, for example by adding some items to regular shopping trips, and to check them every six months to replace any that have expired.

It comes as government agencies and companies around the world temporarily shut down their websites last week after a major security flaw was found in an open-source programming language that powers about 70% of the internet.

"We're going to find these sorts of things happening more and more," said the UK's defense minister, Wes Streeting, on Friday. "And it's not just from foreign states engaging in espionage or sabotage. It's also organized criminals."

About 400,000 British homes also lost power at some point over the weekend as two back-to-back storms battered northern Europe.

But UK officials have also increasingly warned about the need to deter the threat of war in Europe, and are hoping to raise their country's national resilience in the face of such a possibility.

"Our adversaries' willingness to harm us is not new. What has changed is their capacity. By 2030, their force strength and war economy could put them in a position to attack," Streeting told The Telegraph on Sunday.

The defense minister added that the UK had 1,000 days left to prepare itself for war.

If you're based in the UK and have a reaction to share about the UK stockpiling notice, email our reporter: ghennessy@businessinsider.com.