Cutting off enemy units is the key to victory. Even the greatest concentration of units can be vanquished when cut off from their supply lines.

Wherever possible, shorten your lines. Make use of bottlenecks. This will free units for a concentrated attack elsewhere. And make your reinforcements arrive faster to the frontline.Keep a unit on every city, if you can. It will prevent raids on your rear. Wounded units heal faster. Also:Units on cities cost no upkeep. It's the fastest way to gain cash in the beginning of the game.Naval attacks fail more often than they succeed. Dieppe is more likely than Normandy. Only attack by sea if you're certain of victory - or to distract the enemy in the rear.