Question 1 According to Dr. Breen, why did Irish immigrants play a big part in military resistance against the British during the Revolutionary War? Answer The Irish were better citizen soldiers than most American colonists. Thomas McKean, a signer of the Declaration of Independence and son of Irish immigrants, encouraged Irish immigrants in the mid-Atlantic region to enlist in the Continental Army. Because the Irish had their own grievances against the British, they were easily convinced that a rebellion against British control was a good idea. Irish immigrants joined the American cause to claim bounty-land warrants for military service.