Complex sentence: Following the outbreak of the Pacific War she was commissioned into the RAN in December 1941 and her armament was increased to a 20mm cannon, a 0.50 calibre heavy machine gun and several lighter machine guns.
Split into simpler sentences: Following the outbreak of the Pacific War she was commissioned into the RAN in December 1941. Her armament was increased to a 20 mm cannon, a 0.50 calibre heavy machine gun and several lighter machine guns.