Complex sentence: He married Bettie South (Phyllis Hall) in December 1941 when he was 28, shortly after he was posted to the Far East during the Second World War and did then not see Bettie for over four years until the war ended in 1945.
Split into simpler sentences: He married Bettie South (Phyllis Hall) in December 1941 when he was 28, shortly after he was posted out to fight during The Second World War. Winter did then not see Bettie for over 4 years until the war ended in 1945.