He also led the last attack of that army not long before its defeat to Union forces at Appomattox Court House on the morning of April 9 , 1865 .
Grimes was the last man in the Army of Northern Virginia to be appointed as a major general .
Grimes also led the last attack of that army not long before its defeat to Union forces at Appomattox Court House on the morning of April 9 , 1865 .
Grimes was the last man in the Army of Northern Virginia to be appointed as a major general .