The 103rd Cavalry Regiment was a unit of the Pennsylvania National Guard that existed from 1921 to 1940, when it was re-designated the 190th Field Artillery Regiment.

The regiment was assigned to the 21st Cavalry Division.

The 103rd Cavalry provided relief assistance during floods in 1936.

During 1937-1938, Maurice Rose was a regular army instructor to the 103rd Cavalry.

[2] The regiment was relieved from the 21st Cavalry Division and assigned to the 22nd Cavalry Division in January 1939.