Complex sentence: He was later awarded the Military Cross in 1946 for his actions as technical adjutant after the battalion crossed the Rhine, the boggy country meant tanks frequently got stuck, he was responsible for recovering them and battle-damaged tanks, often under fire.
Split into simpler sentences: He was later awarded the Military Cross in 1946 for his actions as technical adjutant after the battalion crossed the Rhine. Tanks were frequently stranded in the marshy ground and he was responsible for recovering them and also battle-damaged tanks, often under fire.