Complex sentence: After the second day most of the Dutch warships were out of powder and shot, and there was none to resupply with, but the third day ended just the same, with a failure to break the Dutch line.
Split into simpler sentences: After the second day most of the Dutch warships were out of powder and shot, and there was none to resupply with. The third day ended just the same, with a failure to break the Dutch line.