Complex sentence: In fact, in 1942, condoms were issued to soldiers during the landing on Dunkirk and were used to cover and protect rifle barrels from being damaged by salt water as the soldiers waded ashore.
Split into simpler sentences: In fact, in 1942, condoms were issued to soldiers during the landing on Dunkirk. They were used to cover and protect rifle barrels from being damaged by salt water as the soldiers waded ashore.