Complex sentence: They were dismounted and eventually became "The 14th (FFY) Battalion, of The Black Watch" As part of the 74th (Yeomanry) Division they served in Egypt and Palestine in 1917 and 1918 before being moving to France in 1918.
Split into simpler sentences: They were dismounted and eventually became "The 14th (FFY) Battalion, of The Black Watch". Serving in Egypt and Palestine in 1917 and 1918 before beingmove to France in 1918.