Ukraine is the second largest country in Europe after Russia, gaining independence from the Soviet Union and declaring neutrality in 1991. In February 2022, Russia's President Vladimir Putin ordered an invasion of Ukraine under the auspices of a "special military operation" to "de-nazify" the country. The move turned Moscow into a global pariah, and the Ukrainian army - backed financially and militarily by the US and western European countries - continues to fight off the invading forces. Nuclear-armed Russia has warned of consequences if Nato interferes in the war, while strategic ally China urges a peaceful, diplomatic solution.