Complex sentence: During the morning of 11 June, one of the posts held by the Australian infantry was blown in by German artillery; braving machine-gun and sniper fire, Towner went out in daylight to help reorganise the post.
Split into simpler sentences: During the morning of 11 June, one of the posts held by the Australian infantry was blown in by German shell fire. Despite German machine gun and sniper fire, Towner went out in the daylight and assisted in reorganising the post.