Complex sentence: Winters, p.186 A rolling artillery barrage had been coordinated in support of the ground assault on the morning of 7 June; to initiate the attack, artillery fire was adjusted back towards American lines before moving forward in increments.
Split into simpler sentences: Winters, p.186 A rolling artillery barrage had been coordinated in support of the ground assault on the morning of June 7. To initiate the attack, artillery fire was adjusted back towards American lines before moving forward in increments.