Complex sentence: While this was a ruse (the reinforcements were a single officer) that saved the British force from probable capture, more of Burgoyne's army soon came down the road, forcing the Americans to retreat from Fort Anne to Fort Edward.
Split into simpler sentences: While this was a ruse (the reinforcements were a single officer), it saved the British force from probable capture. More of Burgoyne's army soon came down the road, forcing the Americans to retreat from Fort Anne to Fort Edward.