LVIV, July 27 - Helicopters provided air support, armored personnel carriers rolled through fields, and soldiers fired at enemy targets on Tuesday as part of a large military exercise hosted by Ukraine and also involving the United States, Poland and Lithuania, Reuters reported.

The drills, called Three Swords-2021, will involve more than 1,200 servicemen and more than 200 combat vehicles and will last from July 17 to 30 at Yavoriv training ground in Lviv region.