Ukrainian forces have pulled U.S.-provided Abrams M1A1 battle tanks from the front lines due to the high risk of detection by Russian drones, two U.S. military officials told the Associated Press (AP) on April 25. The U.S. announced in January 2023 that it would send Ukraine 31 M1 Abrams tanks, a force equivalent to one Ukrainian battalion. Officials confirmed in October 2023 that all 31 vehicles had been delivered. According to the U.S. officials who spoke to the AP, Russian surveillance drones and hunter-killer drones have changed the situation on the ground substantially, increasing the veh…