Can the calculator be incorporated into the game, maybe automatically, somehow? Like a little blurb by your 'military advisor' just next to the attack pane where you enter the target country number. As soon as you enter the number, next to it is a little number. If you put your mouse over that number, "the estimated additional military force necessary to break through target's defenses according to most recent intelligence on the target". And so, as players input the numbers of their various forces to send on that attack, the force calculator number changes. For example, the player might see the force calculator 10040, change to 7040 as he enters 3000 in the field for the number of soldiers he will use in the attack. As he enters 2500 jets, he sees the force calculator number go down to 2040. After inputting 680 tanks, he sees the number go down to 0. He decides to send along a few more than necessary ' just in case'. Clicks send attack, and, yay, the noob didn't have to send all that many more forces than he needed to send, doesn't get as frustrated as previously, sticks around longer and doesn't quit, and EE gains in player-ship.