Choose a map at the war web screen. Select any scenario and arm structure. Wait for the game to load, then type 40hourweeks and press ENTER at the force deployment map. Exit to the main menu, and enter the options screen. Click on "Detail". A "Cheat Active" button marked with a red X will appear. Click on that button to enable cheat mode. The red X will turn into a green check mark to confirm correct code entry.
Enable the "40hourweeks" code. Press K before deploying your forces at the "Deploy Your Forces" screen at the start of the mission. The enemy forces will now be visible on your map. You can double click on them and use them. You can use this to destroy your targets without losing any of your forces. You can also use any units such as pillboxes, helicopters or AA guns.