Complex sentence: Comprising of four Vickers machine guns, the section was attached to the right flank of the 24th Australian Infantry Battalion during the engagement, whose principal objective was to seize the summit of Mont St. Quentin.
Split into simpler sentences: Comprising of four Vickers machine guns, the section was attached to the right flank of the 24th Australian Infantry Battalion during the engagement. The 24th Battalion's principal objective was to seize the summit of Mont St. Quentin.