He accepted Robert E. Lee's surrender at Appomattox Court House
He became 
friends with Grant after the Mexican-American War, and Grant secured an officer's 
commission... [DOC] [TLE] Grant & Lee:Grant & Lee: The Surrender ... - Civil War Trust [PAR] On April 9, 1865 Robert E. Lee, commander of the Army of Northern Virginia, ... 
west so that he could link up with another Confederate army under Joseph E. 
Johnston.