On 25 July 1944, US forces under General Omar Bradley succeeded in breaking through the German defenses as part of Operation Cobra and entered Brittany. Hitler forbade any retreat, and ordered a counteroffensive, codenamed Operation Lüttich, by the XLVII Panzer Corps, consisting of the 2nd Panzer Division, part of the LSSAH, the SS Division Das Reich and the 116th Panzer Division. The plan for the attack to hit the 30th Infantry Division east of Mortain, then cut through American defenses to reach the coast. The US response was aided by Ultra intelligence, which had revealed the plans for Operation Lüttich by 4 August. As a result, Bradley was able to obtain air support from both the US 9th Air Force and the RAF.