The Siege of Boston began on 19th April 1775 and ended on the 17th of March 1776.
The Siege of the city of Boston has been described as the 'opening' of the American revoluntionary war against the British Empire.
It actually began when local militas from New England limited the movement of British Army by land.
In response, an almost 2 year battle began between the British forces and the local militia, which became part of the wider War for Independence.
By the end of the siege the British forces were weak and were finding it almost impossible to hold ground. That is when they retreated back to their stronghold in Halifax, in modern-day Canada.
