Complex sentence: After further training in Palestine, the battalion went into action against the Italians in January 1941, successfully capturing Bardia and Tobruk before being committed to the disastrous Battles of Greece and Crete where the battalion was essentially destroyed after the majority of its personnel were captured.
Split into simpler sentences: After further training in Palestine, the battalion went into action against the Italians in January 1941. After participating in the successful capture of Bardia and Tobruk, it was committed to the disastrous Battles of Greece and Crete, where the battalion was essentially destroyed after the majority of its personnel were captured.