Why is the US Involved in the Russia-Ukraine War

On 19th January 2022, the President of the United States Joe Biden said that he saw a Russian invasion of Ukraine coming ahead and cautioned the President of Russia, Vladimir Putin, that the US will make sure that Russia regrets it.

Russia has gathered 100,000 troops at its border with Ukraine in the last several months. The country has begun moving its military into Belarus for a so-called joint military exercise to take place in Fe....