From 1731 to 1734, the French constructed Fort St. Frédéric, which gave them control of the New France–Vermont frontier region in the Lake Champlain Valley. With the outbreak of the French and Indian War in 1754, the North American front of the Seven Years' War between the French and British, the French began construction in 1755 of Fort Carillon at present-day Ticonderoga, New York. The British failed to take either fort between 1755 and 1758. In 1759 a combined force of 12,000 British regular and provincial troops under Sir Jeffery Amherst captured Carillon, after which the French abandoned Fort St. Frédéric. Amherst constructed Fort Crown Point next to the remains of the Fort St. Frédéric, securing British control over the area.