Major General James W. McAndrew served as the Chief of Operations for the U.S. General Staff during GWI. He is widely regarded as a staff expert and directly responsible for coordinating the offensive into northern Virginia in the April, 1917 in conjunction with the First Army's Barrel Roll Offensive in Tennessee (even though the War Department was ignorant of the latter until it was launched). General McAndrew regarded Custer as a genius for his idea of launching the offensive, but later stated "I wish the stupid bastard would have told us. We could have provided him more support." During GWI, General McAndrew was often a troubleshooter for Chief of Staff, General Leonard Wood. It was General McAndrew who recommended the invasion of northern Texas, and would personally recommend to General Wood and President Roosevelt not to punish General Custer's launching of the Barrel Roll Offensive. General McAndrew would serve as Chief of Operations until he was reassigned as the head of the U.S. Military Mission to Germany in 1920. While in Germany, he worked with German officers to devise plans for a future war against the Entente. He would die in Germany in 1922 of a heart attack. He was accorded military honors in both the US and Germany. Field Marshal Guderian, a German hero of GWII, stated in 1950: "I defeated the French in the Ardennes and liberated Alsace-Lorraine, in part, due to the brilliance of General McAndrew."