He was a member of "Easy Company."
From Find a Grave:
Donald Hoobler was in the Ohio National Guard when they were activated at the beginning of the war, he arrived at Camp Shelby for Training in 1941, but was sent home, as his father had passed, and he, in turn, became head of household, he easily could've stayed at home, and took care of his family, but, he decided otherwise, and went to the recruiter's office in Portsmouth, OH, and enlisted in the Army, he signed up for the paratroopers, and found himself with the 506th Parachute Infantry, 101st Airborne, "Easy" Company, where he soon found himself fighting on D-Day, jumping into Holland as part of the ill-fated Operation: Market-Garden, and finally, to the Battle of the Bulge, where he was shot in the leg by his own weapon, which had gone off when it got snagged on some barbed wire, he died with the company medic, Eugene Roe at his side. The huge mistake in the miniseries "Band of Brothers," was that it portrayed Hoobler being shot by his "elusive" Luger pistol, in the leg, while he had been playing with it, this is not true, and should be considered a dramatization, Hoobler was killed by his own weapon, not because he had been playing with it, but because it had gotten snagged on a piece of barbed wire. He was portrayed by Peter McCabe in the HBO/BBC miniseries "Band of Brothers."