After what battle did the French decide to align with the colonies

While France and the Colonies had flirted with each other it was not until the British surrender at the Battle of Saratoga in 1777 that France decided to ally with the Colonies against Britain. Representatives of the French and American governments signed the Treaty of Alliance and the Treaty of Amity and Commerce on February 6, 1778.

Explanation:

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).

c) troops march forward in close formation against newer, more accurate weapons