What was a critical factor in the success of the American Revolution?

International military support was indeed a critical factor in the success of the American Revolution. The aid received from foreign powers, most notably France, significantly bolstered the American war effort. The French provided not only military assistance in terms of troops and naval support but also crucial financial resources and supplies.

The alliance with France began formally in 1778, following American victories such as the Battle of Saratoga, which demonstrated the Patriots' potential for winning against British forces. The French entered the war with vested interests in weakening British dominance, and their participation turned the tide in favor of the Americans. Additionally, the presence of French naval forces at pivotal moments, such as during the Siege of Yorktown, helped ensure a decisive victory that led to the surrender of British General Cornwallis.

Other factors like isolation from British influence or American numbers were not as significant. The colonies were still relatively connected to Britain economically and culturally, and while the colonists had some numerical advantages in certain instances, they were often outnumbered and faced a well-trained British army. Strong governance by the Articles of Confederation came after the war and was characterized by significant weaknesses, which did not contribute to the success of the Revolution.