Complex sentence: Out of the 2,468 major landing vessels in the two task forces deployed on 6 June 1944 346 were American and of the 23 cruisers covering the landings, 17 were British.
Split into simpler sentences: Out of the 2,468 major landing vessels in the two task forces deployed on 6 June 1944 only 346 were American. Of the 23 cruisers covering the landings, 17 were British.