Instructions:

Click on a white square, then hit:

• a: Army of units (no Queen / King)
• b: Bishop
• r: Rook
• q: Queen
• p: Pawn
• k: King
• n: Knight

Click a piece to select it, and click again on a green or yellow square to place it.

Some of the pieces have special abilities, activated by selecting the piece and pressing spacebar:

• Bishop: Convert all pieces in the affected area
• Rook: Build bridges across the black tiles
• Queen: Throw a grenade (click to throw)
• Pawn: Blow up, destroying the land
• King: None
• Knight: None

Since this is still in development, I'll leave it up to you to figure out the rest.

Good Luck!