The early British colonists, imbued with the English distrust for standing military establishments as a threat to civil liberties, incorporated the tradition of the citizen-soldier. In 1636, the first militia unit, the North Regiment of Boston, was formed, followed two years later by the Ancient and Honorable Artillery Company, the oldest American military unit in existence.
One of the first acts of Parliament following the accession of William and Mary to the throne of England as a result of the Glorious Revolution of 1688 was to restore the old constitution with its provision that
every man may arm for self-defense.
In 1760, Britain began adopting mercantilist policies toward her American colonies. By 1768, these had produced such hardships and a reversal of the previous prosperity that British troops had to be sent to suppress riots and collect taxes.
Between 1768-1777, the British policy was to disarm the American colonists by whatever means possible, from entrapment, false promises of safekeeping, banning imports, seizure, and eventually shooting persons bearing arms.
By 1774, the British had embargoed shipments of arms to America, and the Americans responded by arming themselves and forming independent militia companies.
On the night of 18 April 1775, General Gage, Governor of Massachusetts, dispatched several hundred soldiers of the Boston garrison under the command of Major Pitcairn to seize the arms and munitions stored by the illegal colonial militias in Concord.
When Pitcairn encountered the Minutemen on the Lexington common blocking his way, he demanded that they throw down their arms and disperse. Although willing to disperse, the Minutemen were not willing to surrender their arms. The rest is history.
Three days after the British retreat from Concord, General Gage refused to allow Bostonians to leave the city without depositing their arms and ammunition with a Selectman at Faneuil Hall, to be returned at a suitable time after their return. When the citizens of Boston foolishly complied, Gage seized the arms and refused to permit their owners to leave the city. ("Declaration of the Causes and Necessity of Taking up Arms," July 6, 1775.)
The news of Gage's seizure of the arms of Bostonians not engaged in hostilities and rumors of British troops sailing from England to seize the arms of the colonists swept the colonies.
The colonists considered these actions a violation of their constitutionally guaranteed right to have and use arms for self-preservation and defense, as indeed they were.
What gun control laws did Great Britain have when the American colonies revolted? - Yahoo! Answers