@barnee “Axis & Allies ‘Revised’ is the 20th Anniversary edition of the game. It was released in 2004 and is a global World War II game, set in 1942. It’s a remake of the 1984 version of the game.”
“Appendix 3: Optional Rules”
“Veteran players may wish to vary the play experience. The following optional rules set out national advantages for each power in the game, simulating its historic strategies or benefits. A power may not share its national advantages with friendly powers.”
“United Kingdom National Advantages”
“2. Joint StrikeThe most powerful strike in the war was the joint Allied assault on Normandy. The planning required to launch this simultaneous invasion has never been equaled.Once during the game, on your turn, you may declare a joint strike. You complete your turn as normal,except you skip your combat move and conduct combat phases. (Any of your units may move on your noncombat move phase.) On the U.S.’s turn, the U.S.’s player can move any of your units during his or her combat move phase and conduct combat with them, as if they belonged to the U.S. You and the U.S.’s player must agree on attacking casualties, or the opposing player gets to choose them.”