The full expedition set out from Fort Western on September 25.  Morgan's riflemen led the way, blazing trails when necessary. Colburn and a crew of boatwrights came in the rear, to repair bateaux as needed.  Morgan's group traveled relatively lightly, as they would be working to make the trail, while the last group, commanded by Lieutenant Colonel Enos, carried the bulk of the supplies.  The expedition arrived at its first target, Fort Halifax, a decaying relic of the French and Indian War , on the second day. There was a rough track from Fort Western, so some of the men and supplies had moved overland rather than in the bateaux that had to be portaged around the falls above Fort Western to begin the trip.  Arnold, rather than traveling in a heavy bateau, traveled in a lighter canoe so that he might move more rapidly among the troops along the travel route. 
Through André, Benedict provided information to the British that he—and they—believed would win the war. Benedict had become commander of West Point, a strategic fort on the Hudson River. He passed along news of how many troops were stationed at the fort and when defenses might be weakest. He also did his best to undermine the Americans’ hold on the fort by failing to make needed improvements, using up supplies and sending troops on unnecessary missions. But when André was captured (and executed), Benedict’s treason was uncovered. He fled to New York, which was held by the British, leaving Peggy at their West Point home to face colonial military leaders, including George Washington , by herself.
By 1780, Benedict was very bitter toward the Continental Congress. Appointed as the commander of the fort at West Point, New York, he offered to hand it over to British forces for a large sum of money. Arnold’s plan, however, was discovered, and he quickly swore allegiance to the British. He commanded British forces in several small-scale battles, but they would soon back out of the war, much to his contempt. By 1783, America was free and Benedict could never go back. Ironically, Benedict Arnold was also passed over for several promotions in the British Army because he was not trusted. In the years after the war, he made many unwise business decisions in England and in Canada. He died in 1801, virtually penniless. He is said to have prayed to God for forgiveness for betraying the Patriot cause in the moments before his death. He is even said to have requested to be buried in the uniform of a Continental soldier. He is buried in England.