War and Peace is truely a strategic level game - units are
represented as abstract strength points, with battle being clashes between
stacks of units.  There are three types of units - infantry, cavalry, and
leaders.  Cavalry are only distinguished by the fact that they can move
independently of leaders.  Leaders are key to the game - they are
necessary for infantry movement, can force march units to move them
farther, and their ratings serve as combat modifiers.  The only real
tactical consideration is that the side in a battle with superior cavalry
strength may withdraw from the battle without taking additional losses. 
 
In general, the first few scenarios (1-4) are all similar -
Napoleon must race against time to defeat one or more of the European
powers before the others sense that France is vulnerable and enter the war
against her.  The objective of the non-French player is principally to
slow and disperse the French advance so that Napoleon can be defeated and
turned back late in the game. 

Tom