In September 1775, early in the American Revolutionary War, Benedict Arnold led a force of 1,100 Continental Army troops on an expedition through the wilderness of what is now Maine that was part of a two-pronged invasion of the British Province of Quebec. The other expedition, led by Richard Montgomery, invaded Quebec from Lake Champlain. Arnold's expedition was a success in that he was able to bring a body of troops to the gates of Quebec City. However, the expedition was beset by troubles as soon as it left the last significant outposts of civilization in Maine. There were numerous difficult portages as the troops moved up the Kennebec River, and the boats they were using frequently leaked, spoiling gunpowder and food supplies. The height of land between the Kennebec and the Chaudière Rivers was a swampy tangle of lakes and streams, and the traversal was complicated by bad weather and inaccurate maps; more than one quarter of the troops turned back at this point. The descent down the Chaudière resulted in the destruction of more boats and supplies as the inexperienced troops were unable to control the boats in its fast-moving waters.