Port Huron, Michigan attorney; officer in the Michigan National Guard beginning in 1905, later Judge Advocate with the U.S. Army during World War I. After the war, Pepper was chief law officer of the MNG where he was advisor during the Flint Sit-Down strike of 1937. Biographical material; correspondence with family and friends concerning in part current events and politics in pre-World War I Canada; correspondence with wife Katherine while serving in France 1918-1919; papers relating to his official responsibilities with the Michigan National Guard, as Judge Advocate, and as member of veterans organizations; include files relating to the Copper Miners' Strike of 1913 and to the Flint Sit-Down strike; also diaries, 1916-1919, of his experiences serving on the Mexican border and in France during the First World War; papers relating to Republican party activities in 1920 and 1924; and photographs.
The Samuel D. Pepper papers cover Pepper's military service and legal career, as well as his relationships with family and friends. The collection provides particularly strong documentation of the impact which Pepper's Michigan National Guard (MNG) service had on personal and professional aspects of his life. The papers are divided into four main series: Personal, Military Activities, Professional and Political Activities, and Photographs.