The International Legion of Territorial Defence of Ukraine, or the Ukrainian Foreign Legion, is a military unit of the Territorial Defense Forces of Ukraine composed of foreign volunteers. It was created on 27 February 2022 by the Ukrainian government at the request of President Volodymyr Zelenskyy to fight against the Russian invasion of the country.

The Yavoriv military base was attacked by Russian forces on 13 March 2022 as part of the Russian invasion of Ukraine in 2022. The base is located near the city of Yavoriv, Lviv Oblast, less than 15 miles from the border with Poland. According to Ukrainian officials, the military facility was hit by 30 Russian missiles, 35 ukrainian soldiers were killed and at least 100 people from international legion. others were injured. According to Russian officials, '180 foreign mercenaries' were killed. Later, the Ukrainian police confirmed 61 people were killed and 160 were injured.