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How big is Ukraine's military compared to Russia's? How long could Ukrainians hold off an attack?

WASHINGTON – This time, it won’t be so easy.

Russia had no problem getting past Ukraine’s military forces when it orchestrated a bloodless takeover of the Crimean Peninsula in 2014. Russian President Vladimir Putin even boasted that not a single shot was fired during the assault.

But Russian troops will face a far more formidable adversary if Putin invades Ukraine again now. Ukraine’s military is better trained, better equipped and more battle-tested than it was eight years ago, experts say.

“They are not what they were in 2014,” said Jim Townsend, a former U.S. deputy assistant secretary of defense.

Fears have sharply escalated in recent weeks that Russia could invade its smaller neighbor. On a call Saturday, President Joe Biden warned Putin that an invasion of Ukraine would result in "swift and severe costs for Russia."

A senior Biden administration official said the call resulted in "no fundamental change in the dynamics that have been unfolding now for several weeks."

The White House has now warned that a Russian invasion of Ukraine could be imminent, perhaps before the conclusion of the Beijing Winter Olympics, which end Feb. 20.

While Russia is still the superior military power and would almost certainly prevail, Ukraine’s defense forces could inflict significant damage on Russian troops, according to an analysis by the Atlantic Council, a non-partisan think tank based in Washington.

“In collaboration with reservists, civil society, and volunteers, they can make any attempted invasion a miserable experience for Russia,” the group concluded in a recent report.

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Members of Ukraine's volunteer military units  train in a city park in Kyiv on Jan. 22, 2022.
Members of Ukraine's volunteer military units train in a city park in Kyiv on Jan. 22, 2022.

How big is Ukraine’s military?

Ukraine has 250,000 active-duty troops, plus another 290,000 reserve personnel and 50,000 paramilitary units that could be activated in a conflict with Russia. In 2014, by comparison, Ukraine had just 140,000 troops, and only 6,000 of those were ready for combat.

How big is Russia’s military?

Russia has more than 1 million active-duty personnel, more than four times Ukraine's force strength. Russia also has 378,000 reserve personnel and 250,000 paramilitary troops that it could call up in a conflict with its neighbor.

Who has the most weapons?

Russia, hands down.

In terms of land power, Russia prevails, with more than 12,000 tanks (compared with 2,500 for Ukraine), 30,000 armored vehicles (Ukraine has 12,000) and 12,000 self-propelled artillery (Ukraine has just a little over 1,000).

Russia also dominates in airpower, with more than 700 fighter aircraft (compared with around 70 for Ukraine), more than 700 attack aircraft (Ukraine has fewer than 30), more than 500 attack helicopters (Ukraine has 34) and 1,500 helicopters (Ukraine has a little over 100).

At sea, Russia rules with 15 destroyers, 70 submarines, 11 frigates and nearly 50 mine warfare vessels. Ukraine has no destroyers or submarines, just one frigate and one mine warfare vessel.

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Who is sending weapons to Ukraine?

The U.S. has already spent billions of dollars to help Ukraine build up its military defenses, an investment that's likely to escalate dramatically if Russia invades.

Though Biden has said the U.S. would not send troops to help defend Ukraine against Russian forces, he said the U.S. probably would send more American forces to other European countries, including Poland and Romania. The Pentagon announced on Monday it is putting 8,500 U.S. troops on "heightened alert" for possible deployment to Eastern Europe amid the crisis.

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And in January, the White House said it will give an additional $200 million in defensive military equipment to Ukraine. The package reportedly includes anti-armor missiles, ammunition and other items.

The U.S. is sending weapons to Ukraine through third-party transfers, in which NATO members provide U.S.-made weapons. The transfers include javelin anti-tank weapons from Estonia, stinger air defense systems from Lithuania and Latvia and anti-tank missiles from the United Kingdom.

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How is Ukraine’s military different from 2014?

Ukraine was completely unprepared for war when Russia invaded Crimea in 2014.

Its armed forces were not manned, equipped or trained to meet Russian aggression, and its logistic stockpiles were essentially non-existent, with the exception of weapons and ammunition mostly from the Soviet period, according to the Atlantic Council.

Ukraine has made modernizing its military a priority over the past seven years but decades of neglect have been difficult to overcome, the council reported.

Ukraine's military still has several strategic vulnerabilities, including gaps in key operational and combat capabilities. Corruption remains a problem, funding is limited because of the general economic conditions in the country, and many important weapons purchases have been placed on the back burner – not because of a lack of will but because of a lack of funding, the council’s analysis concluded.

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So how long could Ukraine hold Russia off?

It’s hard to say.

Russia would probably attack Ukraine from different directions, forcing Ukraine to split up its forces to confront the advancing troops, Townsend said.

“They're going to have to defend Ukraine from a number of different avenues of approach,” he said, “so it just makes their inferiority even worse because they’re going to be thin.”

On top of that, Russia would likely engage in cyberattacks against Ukraine’s military and civilian society, which from the outset could degrade the country’s electrical grid and telecommunications systems, Townsend said.

“I don't think you're going to see the Ukraine being able to stop the Russians for a long period of time,” he said.

Michael Collins covers the White House. Follow him on Twitter @mcollinsNEWS.

Contributing: Joey Garrison, Karina Zaiets, Stephen J. Beard, Javier Zarracina and George Petras

This article originally appeared on USA TODAY: Ukraine and Russia militaries: What to know about power and size