Last month must have been a nasty surprise for my oppenent. Monthes of preparation, patience, doubts (I was wary of a possible Montcalm blitz again Albany) and at a successfull counter attack.
The end of the summer 1757 must be used to take full advantage of this strategic surprise, I have to strike down Montcalm's army and gain strategic positions before the French have a chance to recover.
Mohawk Valley: The Battle for Oswego
Therefore, I order Abercromby (despite him being a slow mover) to rush onto Oswego. Montcalm's army must be retreating in this direction and I have to catch in the open field. If Montcalm has the time to close Osewego's gates in front of me, I should be able to undertake a successfull siege. Indeed, last year my troops were ordered to destroy Oswego's defenses before to abandon the town. The French do not seem to have rebuild them yet.

Some of my troops have been seriously depleted in the previous battle, I order them to go back to Albany in order to get some rest and avoid complete destruction in a new fight.
Lake Champlain
George Munro's troops are still blocking for the French and their allies the road to Albany in Fort Henry. I decide to send my faithfull Mohicans in a retaliation raid against Fort Frederic (it's great this immersive feeling to be in the middle of the movie/book).

The war in the Wild West
While the French have barricaded themselves in Fort Duquesne (7), my troops have bypassed them and have destroyed two indian villages (1&2). These tribes will never be part of the war again... I decide to keep this move ahead and deepen myself further in ennemy territories.
George Washinton (1) will use his superior mobiliy and his abilities in guerrilla tactics to scout Detroit (5) and will seize if undefended. Governor Lawrence (2) will follow him from a distance with more important forces, destroying all indian villages on the way (6). Meanwhile, Dunbar (4) will take his quarters in Fort Leboeuf, hopefully capturing some boats to sail on Lake Erie.
