Why was Fort Ticonderoga important to the colonists?

Fort Ticonderoga, the American colonists were able to secure control of the important inland of Lake Champlain and Lake George, while also protecting the American colonists from British invasion from Canada.

the conditions that made the byzantine empire vulnerable to attacks by the muslin turks were the sack of constantinople by western crusaders, the conquests of the sultanate of rum, presence of rival kingdoms and finally the set up of fiefdoms at the empire which were owned by the ghazis (turkish warriors).