Reinforcements played a minimal role in the Battle of Bunker Hill, as they arrived too late to influence the outcome significantly.

Although more American troops were anticipated, they did not arrive on the battlefield until after the British had successfully captured the fortifications on Breed's Hill. By the time these reinforcements showed up, the fighting had escalated, and the American forces were already having difficulty holding their ground against the relentless British attacks. As a result, the delayed arrival of reinforcements underscored the difficulties the colonial militias encountered in coordinating support during crucial phases of the battle, ultimately affecting their overall effectiveness.