Military career
Between 1755 and 1757, Ward was called to active duty at intervals that alternated with his attendance at the General Court. In 1755 the Massachusetts militia was restructured for the war; Ward was made a major in the 3rd Regiment which drew its company mainly from Worcester County. The 3rd primarily served as a garrison force along the frontier in western Massachusetts. In 1757 he was promoted to regimental colonel of the 3rd Regiment of the militias of Middlesex and Worcester counties. In 1758 the regiment marched with Abercrombie's force to sortie on Fort Ticonderoga, but Ward was sidelined during the campaign by an "attack of the stone."
By 1762, Ward returned to Shrewsbury permanently and was named to the Court of Common Pleas. In the General Court (the provincial assembly) he, with Samuel Adams and John Hancock, was appointed to the taxation committee. On the floor, he was second only to James Otis in speaking out against the acts of parliament in London. His prominence in these debates prompted the Royal Governor Francis Bernard to revoke his military commission in 1767. At the next election in 1768, Bernard voided the election results for Worcester and banned Ward from the assembly, but this didn't silence him.
In the growing sentiment favoring rebellion, the 3rd Regiment resigned en masse from Crown service on October 3, 1774. They then marched on Shrewsbury to inform Ward that they had unanimously elected him their leader. Later that month the governor abolished the assembly. The towns of Massachusetts responded by setting up a colony-wide Committee of Safety. One of the first actions of the committee was to name Ward as general and commander-in-chief of the colony's militia.
Following the Battle of Lexington and Concord on April 19, 1775, the rebel (colonial) forces followed the British troops back to Boston and deployed to start the Siege of Boston, cutting all land access to the city. At first Ward directed his forces from his sickbed (in Shrewsbury), later moving his headquarters to Cambridge. Soon, both the New Hampshire and Connecticut provisional governments named him commander of their forces participating in the siege. Most of his efforts during this time were devoted to organization and supply problems.
Additional British forces arrived by sea in May, and in June, Ward learned of their plan to attack Bunker Hill. He gave orders to fortify the point, setting the stage for the Battle of Bunker Hill on June 17, 1775. Command during the battle devolved upon General Israel Putnam and Colonel William Prescott.
Meanwhile, the Continental Congress was creating the Continental Army. On June 17, Congress commissioned Ward a major general, and appointed him second in command to General George Washington. (Ward was one of the original four major generals in the Continental Army along with Charles Lee, Philip Schuyler and Israel Putnam.) Over the next nine months he helped convert the assembled militia units into the Continental Army.
After the British evacuation of Boston on March 17, 1776, Washington led the main body of the army to New York City. Ward took command of the Eastern Department and held that post until March 1777, when ill health forced his resignation from the army.