When William Pitt became prime minister in 1757, the attitudes toward the war made a remarkable change in the colonies, and in 1758, the Massachusetts General Court voted to raise 7,000 provincial soldiers to serve until November unless released earlier. The Massachusetts provincials participated in Abercrombie's expedition against Ticonderoga. The failed attack on Fort Carillon stalled further advances, and the provincials spent the rest of the summer at Lake George, building Fort George as a replacement for William Henry.