Final answer:
France joins the war against the British, now the British have to fight a war on two fronts. facing both the American rebels and French forces. The historical context includes the French and Indian War, a battle for control over North American territories between Great Britain and France with their respective allies. The correct answer is option: a) two.
Step-by-step explanation:
When France joins the war against the British, the British find themselves engaged in a two-front war. This is because the British had to simultaneously fight against the American colonists who were seeking independence and against France, which had sided with the Americans. Additionally, Spain's entry into the war in 1779 complicated matters for Britain. The involvement of France on the American side is significant as it marked a turning point in the conflict and directly contributed to the eventual British defeat.
The background history involves the French and Indian War (1754-1763), which is also known as the Seven Years' War in Europe. This war saw Great Britain against France and their Native American allies for control of North America. It spread to Europe, engaging various European powers, and was characterized by the British fighting against Catholic France and sometimes Spain in various conflicts for imperial dominance.
The war involved significant strategy and tactics such as those used by William Pitt, who assumed leadership and mobilized a substantial force to engage France in North America. He also enacted blockades to disrupt French supply and weakened their alliances with Native American tribes.