Events on June 17 in history

American Revolutionary War: Colonists inflict heavy casualties on British forces while losing the Battle of Bunker Hill.

The Battle of Bunker Hill was fought on Saturday June 17, 1775 during the Siege of Boston in the first stage of the American Revolutionary War. The battle is named after Bunker Hill in Charlestown, Massachusetts, which was peripherally involved in the battle. It was the original objective of both the colonial and British troops, though the majority of combat took place on the adjacent hill which later became known as Breed's Hill.On June 13, 1775, the leaders of the colonial forces besieging Boston learned that the British were planning to send troops out from the city to fortify the unoccupied hills surrounding the city, which would give them control of Boston Harbor. In response, 1,200 colonial troops under the command of William Prescott stealthily occupied Bunker Hill and Breed's Hill. During the night, the colonists constructed a strong redoubt on Breed's Hill, as well as smaller fortified lines across the Charlestown Peninsula.By daybreak of June 17, the British became aware of the presence of colonial forces on the Peninsula and mounted an attack against them that day. Two assaults on the colonial positions were repulsed with significant British casualties; the third and final attack carried the redoubt after the defenders ran out of ammunition. The colonists retreated over Bunker Hill, leaving the British in control of the Peninsula.The battle was a tactical, though somewhat Pyrrhic, victory for the British, as it proved to be a sobering experience for them; the British incurred many more casualties than the Americans had sustained, including many officers. The battle had demonstrated that inexperienced militia were able to stand up to regular army troops in battle. Subsequently, the battle discouraged the British from any further frontal attacks against well defended front lines. American casualties were comparatively much fewer, although their losses included General Joseph Warren and Major Andrew McClary, the final casualty of the battle.The battle led the British to adopt a more cautious planning and maneuver execution in future engagements, which was evident in the subsequent New York and New Jersey campaign, which arguably helped rather than hindered the American forces, as their new approach to battle was actually giving the Americans greater opportunity to retreat if defeat was imminent. The costly engagement also convinced the British of the need to hire substantial numbers of Hessian auxiliaries to bolster their strength in the face of the new and formidable Continental Army.

The American Revolutionary War (April 19, 1775 – September 3, 1783), also known as the Revolutionary War or American War of Independence, secured a United States of America independent from Great Britain. Fighting began on April 19, 1775, followed by the Declaration of Independence on July 4, 1776. The American Patriots were supported by France and Spain, conflict taking place in North America, the Caribbean, and Atlantic Ocean. It ended on September 3, 1783 when Britain accepted American independence in the Treaty of Paris, while the Treaties of Versailles resolved separate conflicts with France and Spain.Established by Royal charter in the 17th and 18th centuries, the American colonies were largely autonomous in domestic affairs and commercially prosperous, trading with Britain and its Caribbean colonies, as well as other European powers via their Caribbean entrepôts. After British victory in the Seven Years' War in 1763, tensions arose over trade, colonial policy in the Northwest Territory and taxation measures, including the Stamp Act and Townshend Acts. Colonial opposition led to the 1770 Boston Massacre and 1773 Boston Tea Party, with Parliament responding by imposing the so-called Intolerable Acts.

On September 5, 1774, the First Continental Congress drafted a Petition to the King and organized a boycott of British goods. Despite attempts to achieve a peaceful solution, fighting began with the Battle of Lexington on April 19, 1775 and in June Congress authorized George Washington to create a Continental Army. Although the "coercion policy" advocated by the North ministry was opposed by a faction within Parliament, both sides increasingly viewed conflict as inevitable. The Olive Branch Petition sent by Congress to George III in July 1775 was rejected and in August Parliament declared the colonies to be in a state of rebellion.

Following the loss of Boston in March 1776, Sir William Howe, the new British commander-in-chief, launched the New York and New Jersey campaign. He captured New York City in November, before Washington won small but significant victories at Trenton and Princeton, which restored Patriot confidence. In summer 1777, Howe succeeded in taking Philadelphia, but in October a separate force under John Burgoyne was forced to surrender at Saratoga. This victory was crucial in convincing powers like France and Spain an independent United States was a viable entity.

France provided the US informal economic and military support from the beginning of the rebellion, and after Saratoga the two countries signed a commercial agreement and a Treaty of Alliance in February 1778. In return for a guarantee of independence, Congress joined France in its global war with Britain and agreed to defend the French West Indies. Spain also allied with France against Britain in the Treaty of Aranjuez (1779), though it did not formally ally with the Americans. Nevertheless, access to ports in Spanish Louisiana allowed the Patriots to import arms and supplies, while the Spanish Gulf Coast campaign deprived the Royal Navy of key bases in the south.

This undermined the 1778 strategy devised by Howe's replacement, Sir Henry Clinton, which took the war into the Southern United States. Despite some initial success, by September 1781 Cornwallis was besieged by a Franco-American force in Yorktown. After an attempt to resupply the garrison failed, Cornwallis surrendered in October, and although the British wars with France and Spain continued for another two years, this ended fighting in North America. In April 1782, the North ministry was replaced by a new British government which accepted American independence and began negotiating the Treaty of Paris, ratified on September 3, 1783.