Complex sentence: At 06:15 the 181st Brigade was ordered to advance northwards, with one machine gun section attached to each battalion, and the 2/97th Deccan Infantry in reserve.
Split into simpler sentences: At 06:15 the 181st Brigade was ordered to advance to the north. The 181st had one machine gun section attached to each battalion, and the 2/97th Deccan Infantry in reserve.