The 4th AD's second commander, Major General John Shirley Wood, (known as "P" Wood to his contemporaries, the "P" standing for "Professor", and "Tiger Jack" to his men) who took over the division officially on 18 June 1942, trained the 4th Armored Division for two years before he personally led it into combat in France, on 28 July 1944, and was awarded the Distinguished Service Cross. On 1 August, Gen. George Patton's U.S. Third Army became operational and the 4th AD became the spearhead of the Third Army. The British military armor theorist and historian, Capt. Basil Henry Liddell Hart, once referred to General Wood as "the Rommel of the American armored forces." Like Rommel, Wood commanded from the front, and preferred staying on the offensive, using speed and envelopment tactics to confuse the enemy. General Wood often utilized a light Piper Cub liaison aircraft flown by his personal pilot, Maj. Charles "Bazooka Charlie" Carpenter, to keep up with his rapidly moving division, sometimes personally carrying corps orders from headquarters directly to his advancing armored columns.