| Timeline |
| 1741 |
Born 14 January in Norwich, Connecticut |
| 1756 |
Apprenticeship as an apothecary |
| 1756 |
Runs away from home and enlists in the Connecticut army |
| 1758 |
Runs away from home to join the army during the French and Indian War, is returned at his mother's request |
| 1759 |
Mother dies |
| 1760 |
Again enlists in army, serves in NY |
| 1761 |
Father dies |
| 1762 |
Moves to New Haven, CT - works as an apothecary and bookseller |
| 1767 |
Marries Margaret Mansfield on 22 February |
| 1775 |
Captures Ticonderoga with Ethan Allen's Green Mountain Boys in May; resigns commission in June after dispute with Hinman; fails to capture Quebec in December (is wounded in the leg); wife dies |
| 1776 |
Jan - promoted to brigadier general; Spring - - evacuates Montreal; Summer - accusations of misconduct over "plundering" in Montreal; Oct - fights a series of naval battles on Lake Champlain |
| 1777 |
Feb - promoted to major general; April - drives the British out of Danbury; July - resigned his commission because of a quarrel with Congress over his rank (he withdraws it at Washington's request); Sept - relieved of command by Gates for insubordination |
| 1778 |
Washington awards Arnold with the command of Philadelphia |
| 1779 |
April - Marries Margaret Shippen; Summer - Arnold court martialed, charged by the Pennsylvania Council with using his military office for private gain; begins sending military intelligence to the British commander-in-chief, Sir Henry Clinton |
| 1780 |
Commissioned a brigadier general in the British army |
| 1780 |
Given the command of West Point in July - offers to surrender it to the British for 20,000 pounds |
| 1781 |
Jan - attacks and burns Richmond, VA, invades New London, CT; moves to England in December |
| 1785 |
Immigrates to New Brunswick intending to resume the occupation of a West Indian trader |
| 1792 |
Returns to England; duel with the Earl of Lauderdale after the latter had impugned his honour in the House of Lords |
| 1793 |
Establishes a West Indian trading company, volunteers under Sir Charles Grey, the British army commander in the West Indies, acting as an agent of West Indian commercial interests and assisting in the supply service |
| 1795 |
Returns to England |
| 1801 |
Dies 14 June in London |
