When the American Civil War began, Tubman worked for the Union Army, first as a cook and nurse, and then in Army Intelligence as an armed scout and spy. As an Army Intelligence Officer she was the first woman to plan and lead an armed expedition in the war, she guided the Combahee River Raid, a union army commando raid which liberated more than 700 slaves in South Carolina and destroyed a critical ammunition supply depot of the Confederate Army. When she died, Tubman was buried with military honors at Fort Hill Cemetery in Auburn.