The POD begins here. The British have such success in the battle that they decide to occupy Baltimore. Normally OTL the British had 5,000 men and 19 warships but in the POD they had 15,000 men and 50 warships which destroyed most of the fortifications in the city. The British then landed their men and fought a battle against the Americans, which went surprisingly well for the British losing only 150 men while the American forces lose 90% of their forces and the two generals Samuel Smith & John Stricker.
The British then went on to conquer towns throughout Maryland and eventually captured D.C. The British landed a large ground army for further operation.