Loading archive…
Loading archive…

Lieutenant Colonel Brevet Major General, U.S. Army
Martin Thomas McMahon was an American jurist and a Union Army officer during the American Civil War. Serving with the Union Army, he achieved the rank of Lieutenant Colonel and was later brevetted as a Major General. He was recognized for his conspicuous gallantry on the battlefield during the war's major campaigns, most notably during the Peninsular Campaign in Virginia.
He was awarded the United States military's highest decoration, the Medal of Honor, for his courageous actions at the Battle of White Oak Swamp on June 30, 1862. During the battle, while serving as an aide-de-camp, McMahon displayed exceptional bravery under heavy fire, securing valuable records and performing critical duties that contributed to the Union effort.
Following his distinguished military career, McMahon transitioned to public service and the legal profession in the state of New York. He held various prestigious legal and judicial positions, including serving as a New York State Senator for four years and briefly representing the nation abroad as the Minister Resident to Paraguay, leaving behind a legacy of dedicated military and civil service.
Become the named supporter for this profile and edit the tribute biography and portrait (Owner account required). Proceeds help keep the archive online.