The Cause of the War Between Britain and America The cause of war between Britain and America was over many reasons. America had no representation in the British Parliament. Britain still proceeded to pass laws that would effect the Americans. Americans would not stand for Britain' laws for long. Americans took their first stand against Britain when they rebelled against the Stamp act. In order to keep the colonist from becoming out of hand, British troops were sent to keep peace. The Americans also took action by forming an army. The two armies encountered for the first time at Lexington. This was the beginning battle of the Revolutionary War. While the wa