World leaders are sounding the alarm on a potential Russian invasion into Ukraine as troops amass on the border. (NPR)

What's happening? Over the last month, Russia has deployed 95K–100K+ troops to its border with Ukraine. (CNN)

CNN reported in Nov. that Russian presence on the border increased by "two-thirds" that month, signaling an invasion.

U.S. intelligence last week found satellite images showing Russian plans to deploy 175K+ troops to the border. (CNN)

Ukrainian Defense Minister Oleksii Reznikov estimated Fri. that 94.3K+ Russian troops were stationed near Ukraine. (NPR)

What's the timeline? U.S. intelligence officials say that an invasion could happen "as soon as early 2022." (NPR)

What are world leaders saying? European Commission Pres. Ursula Von der Leyen signaled her support for Ukraine.

Pres. Biden on Tue. warned Russian President Vladimir Putin of potential economic sanctions if Russia invades Ukraine.

Latvian Foreign Minister Edgars Rinkēvičs called on allies to cut Russia from the SWIFT payment system. (Reuters)

Congress is moving to address Russian aggression by adding funding for Ukraine's military in its annual defense bill.

The 2022 defense bill includes $300M+ for the Ukrainian military and $4B+ for the European Defense Initiative. (CNN)

Biden also warned Putin that an invasion would prompt the US to increase its presence on NATO's "eastern flank." (Axios)

Putin, in return, issued an ultimatum calling for an agreement guaranteeing that NATO never expand into Ukraine. (WaPo)

What's next? Only time will tell, but allies are moving to address Russian aggression with a sanctions package. (NPR)