Overnight Wednesday, Russian forces attacked Ukraine, including the capital Kyiv. Russia called the invasion a “special military operation.” Russia’s President Vladimir Putin warned the world that if any country intervenes, they could receive “consequences you have never seen.”

The full-scale attack has already left “dozens dead.” Ukrainian President Volodymyr Zelensky continues to promise “we will defend ourselves” although Russia has publicly stated Zelensky is a direct target they are going after.

The Associated Press reported smoke and debris were seen at a Ukrainian air defense base in Mariupol, a port city in southeastern Ukraine, in the aftermath of an apparent Russian strike on Thursday. “The Russian military claimed to have wiped out Ukraine’s entire air defenses in a matter of hours, though its claims couldn’t immediately be verified.”

President Joe Biden will address the nation at noon on Thursday from the White House. The U.S. and its allies, many of which have or are actively imposing sanctions against Russia, have condemned the attacks against Ukraine.

The AP reports “sirens rang out in Ukraine’s capital, large explosions were heard there and in other cities, and people massed in train stations and took to roads, as the government said the former Soviet republic was seeing a long-anticipated invasion from the east, north and south. It reported more than 40 soldiers had been killed and dozens wounded so far.”