Complex sentence: Under the Childers Reforms these regiments amalgamated to form the King's Own Yorkshire Light Infantry in 1881: that Regiment remained at the barracks until 1938 when they moved to Strensall Camp.
Split into simpler sentences: Under the Childers Reforms these regiments amalgamated to form the King's Own Yorkshire Light Infantry in 1881. The King's Own Yorkshire Light Infantry remained at the barracks until 1938 when they moved to Strensall Camp.