Breidster was raised in Milwaukee, Wisconsin and graduated from East Division (Riverside) High School.
Breidster also competed for Army in swimming and water polo, winning letters three sports.
He was captain of the football, swimming and water polo teams as a senior.
In 1943, Breidster became the Commander of the 173rd Field Artillery Group, comprising five battalions.
Breidster remained active in the Wisconsin National Guard after World War II, attaining the rank of brigadier general in 1947.