Complex sentence: Wilson commanded the 5th Infantry Brigade during the campaign to liberate the Falkland Islands after their seizure by the Argentinian Armed Forces, and was responsible for the southern flank of the eastern island in the British Armed Forces'advance towards the Islands' capital, Stanley.
Split into simpler sentences: Wilson commanded the 5th Infantry Brigade during the campaign to liberate the Falkland Islands after their seizure by the Argentinian Armed Forces. Wilson was responsible for the southern flank of the eastern island and advanced towards the Islands' capital, Stanley.