Complex sentence: The effectiveness of the system was amply demonstrated in Desert Storm, where not a single British Army Challenger tank was lost to enemy tank fire, however one were destroyed by friendly fire on the 25 March 2003 killing two crew members.
Split into simpler sentences: The effectiveness of the system was amply demonstrated in Desert Storm, where not a single British Army Challenger tank was lost to enemy tank fire. However, one was destroyed by friendly fire on the 25 March 2003 killing two crew members.