[6] After the war Augustus Seward continued his military career, serving with the 5th Infantry in: East Pascagoula, Mississippi; Forts Towson and Washita in Indian Territory; on the Utah Expedition; and at Forts Defiance and Union in New Mexico Territory.

[8] Augustus Seward was staying at the home of his father in Washington, D.C., on April 14, 1865, when Lewis Powell attempted to assassinate William H. Seward at the same time John Wilkes Booth was carrying out the assassination of President Abraham Lincoln.

[9][10] His father was in bed recovering from injuries sustained in a carriage accident, and a jaw splint he was wearing as a result likely deflected Powell's knife and saved Seward's life.

[12] Augustus Seward continued to serve in the Army and perform paymaster and staff duties.

He took a leave of absence from the Army and died at the home of his brother Frederick in Montrose, New York, on September 11, 1876.