Montgomery was able to persuade Eisenhower to adopt his strategy of a single thrust to the Ruhr with Operation Market Garden in September 1944. It was uncharacteristic of Montgomery's battles: the offensive was strategically bold, but poorly planned. Montgomery either did not receive or ignored ULTRA intelligence which warned of the presence of German armoured units near the site of the attack. As a result, the operation failed with the destruction of the British 1st Airborne Division at the Battle of Arnhem and the loss of any hopes of invading Germany by the end of 1944.