sentences:  The Continental Army had retreated from Quebec to Fort Ticonderoga and Fort Crown Point in June 1776 after British forces were massively reinforced.They spent the summer of 1776 fortifying those forts and building additional ships to augment the small American fleet already on the lake.General Carleton had a 9,000 man army at Fort Saint-Jean, but needed to build a fleet to carry it on the lake.