Complex sentence: During Operation Brevity an operation to capture the area between Sollum and the fort and inflict casualties, the 22nd Guards Brigade Group and the 4th RTR was to capture the fort and then attack northwards.
Split into simpler sentences: During Operation Brevity an operation to capture the area between Sollum and the fort and inflict casualties. The 22nd Guards Brigade Group and the 4th RTR was to capture the fort and then attack northwards.