Why did Britain change its strategy to focus on the Southern colonies in the summer of 1778?

The French allied with the colonials, and the British believe they had supporters in the south.

Explanation:

The French signed a treaty with the colonials in 1778 which forced the British to rethink their tactics.  They were now having to fight both the newly formed Americans and the French.  The British falsely believed they had more colonial supporters in the south, so began to focus their efforts there in attempt to subvert the French involvement.  This lead to the colonials fighting the British in the south with guerrilla warfare tactics instead of proper field combat, as the British were use to.  For America, the French helped a ton when they joined the war (Thanks Benjamin Franklin).

representative government

explanation:

american revolution: major events leading to declaration of independence. 1765-1766; tax introduced on legal documents to pay for defense of colonies. 1766: stamp act repealed after merchants protesting due to their goods not being bout and officials being threatened.

deadpool

explanation: