On the ground in Ukraine, the war depends on U.S. weapons. Feb. 24 marks a grim milestone: one year since Russia invaded Ukraine. During this time, the U.S. pledged about $113 billion in assistance to Kyiv, more than half in the form of military aid, according to the U.S. Department of Defense. Infantry arms and equipment, air defense systems, missiles, helicopters, drones, armored vehicles, radar and communications antennas, satellite imagery, trucks, trailers, coastal patrol boats, the list goes on. Ukrainian military officials say U.S. weapons are making all the difference. To show how, a senior Ukrainian military intelligence officer and several special forces soldiers guided USA TODAY in mid-February to a secret location on a ridge a few miles outside the frontline town of Bakhmut, in Ukraine's mineral-rich eastern Donbas region. For exclusive accounts of what it’s like on the front-lines in Ukraine and what difference U.S. weapons are making, click the link in @usatoday’s bio. #ukraine