After treatment at US military hospital, volunteers for Ukraine return to fight

U.S. military personnel and staff outside Landstuhl Regional Medical Center (LRMC), Germany, the largest U.S. military hospital outside the United States, which has begun treating groups of wounded foreign volunteers from the Ukrainian Army, in this undated handout picture. U.S. Military/Handout via REUTERS

(Reuters) - After Russian drones dropped a mortar round and then a grenade on an American volunteer fighting for Ukraine, the former U.S. Marine thought he might lose use of his fingers.

Shrapnel hit the right leg and arm of the 28-year-old soldier, who asked to be identified by his call-sign "Jumbo." He needed hand surgery and Ukraine's overstretched medical system had only a bed in a cancer hospital available.