Includes event: American Revolutionary War, Click to see full answer. Hereof, who helped the British during the American Revolution?The main ally for the British during the war was Germany. Britain hired German mercenaries called Hessians to fight for them against the colonists. One of the key generals in the Continental Army was the Frenchman Marquis de Lafayette.Additionally, who participated in the American Revolution? The American Revolutionary War was a war fought between Great Britain and the original 13 British colonies in North America. The war took place from 1775 to 1783 with fighting in North America and other places. Keeping this in consideration, what led up to the American Revolution? The American Revolution was principally caused by colonial opposition to British attempts to impose greater control over the colonies and to make them repay the crown for its defense of them during the French and Indian War (1754–63).How did the American Revolution affect Britain? Financial Effect Britain spent a huge amount of money fighting the Revolutionary War, sending the national debt soaring and creating a yearly interest of nearly 10 million pounds. Taxes had to be raised as a result. The trade that Britain had relied on for wealth was severely interrupted.