On August 17, the British flotilla ordered to Chesapeake Bay arrived off the mouth of the Patuxent River, fifty miles from Washington. With Congress adjourned and most of the well-to-do citizens away from the city to escape the smothering heat wave, there was little activity in the capital. Unfortunately, that lack of activity also extended to those responsible for defending Washington. But all that changed the next day when a messenger arrived with the long-dreaded news that the British invasion force was at hand.

The grand strategic plan of the British in 1814 was to attack up the Lake Champlain corridor and drive deep into New York State, splitting New England off from the rest of the country, a plan similar to the one they had envisioned during the American Revolution. Accordingly, 15,000 men were dispatched to the Canadian front, and, to distract the Americans and force them to divide their meager resources, the British also decided to make a diversionary movement in the Chesapeake Bay, and it was to that part of the country that a British fleet proceeded in early August.

In the spring of 1813, the British Admiralty initiated a push to wreak havoc in the Chesapeake Bay and gave command of an expedition to Admiral John Warren. Cautious by nature, Warren would prove to be a poor choice, but his second-in-command was a tough sailor named George Cockburn, a Royal Navy Captain who first entered the service at the age of nine and would eventually rise to be the First Sea Lord, the highest-ranking officer in the Royal Navy. More importantly, Cockburn was a man who relished the chance to chastise the Americans.