He left Maj. Gen. William Tecumseh Sherman in command of most of the western armies .
In March 1864 , Ulysses S. Grant was summoned from the Western Theater , promoted to lieutenant general , and given command of all Union armies .
Ulysses S. Grant left Maj. Gen. William Tecumseh Sherman in command of most of the western armies .
In March 1864 , Ulysses S. Grant was summoned from the Western Theater , promoted to lieutenant general , and given command of all Union armies .