In the American Revolution, gaining freedom was the strongest motive for Black enslaved people who joined the Patriot or British armies. It is estimated that 20,000 African Americans joined the British cause, which promised freedom to enslaved people, as Black Loyalists. Around 9,000 African Americans became Black Patriots. As between 220,000 and 250,000 soldiers and militia served the American cause during the revolution in total, that would mean Black soldiers made up approximately four percent of the Patriots' numbers. Of the 9,000 Black soldiers, 5,000 were combat-dedicated troops. Notably, the average length of time in service for an African American soldier during the war was four and a half years (due to many serving for the whole eight-year duration), which was eight times longer than the average period for white soldiers. Meaning that while they were only four percent of the manpower base, they comprised around a quarter of the Patriots' strength in terms of man-hours, though this includes supportive roles. In contrast, about 20,000 people escaped slavery, joined, and fought for the British army. Much of this number was seen after Dunmore's Proclamation, and subsequently the Philipsburg Proclamation issued by Sir Henry Clinton. Though between only 800–2,000 people who were enslaved reached Dunmore himself, the publication of both proclamations provided incentive for nearly 100,000 enslaved people across the American Colonies to escape, lured by the promise of freedom. Crispus Attucks was shot dead by British soldiers in the Boston Massacre in 1770 after he shouted, "Kill them! Kill them! Knock them over!" while the soldiers were being battered with shells, ice, and coal by a mob armed with clubs. He is considered an iconic martyr of Patriots. African American Patriots Prior to the revolution, many free African Americans supported the anti-British cause, most famously Crispus Attucks, believed to be the first person killed at the Boston Massacre. At the time of the American Revolution, some Black men had already enlisted as minutemen. Both free and enslaved Africans had served in private militias, especially in the North, defending their villages against attacks by Native Americans. In March 1775, the Continental Congress assigned units of the Massachusetts militia as Minutemen. They were under orders to become activated if the British troops in Boston took the offensive. Peter Salem, who had been freed by his owner to join the Framingham militia, was one of the Black men in the military. He served