It's 1943 in Sicily and war-weary Cash is the commanding officer of a troop unit about to take over a small village. To their surprise, none of the natives offer the slightest resistance to the Americans taking over their town. The only stipulation the villagers have is that the Americans delay the takeover for a few more days as the main event on the town's annual social calendar, a football match followed by a wine festival, is scheduled to be held.
If the US is willing to wait until these two events have ended, all will go smoothly. Cap. Cash thinks he may not have done right by agreeing to the deal. But his second in command, Lt. Christian, convinces him that all they will lose is a brief time and they may save many lives. Once the decision is made, the Americans and Italians join forces for an orgy of partying that turns into a round-the-clock bacchanalia that would have pleased Nero.
While the fun is going on, both the Germans and the US send reconnaissance planes whose crews take the party for severe fighting. The Germans radio to their troops to attack the town and when they do, they find Americans wearing every sort of uniform, including German togs. American flags fly high over the town as the Germans begin to round up all the drunken troops. The US forces have been alerted and a unit is sent to rescue the first group. They pop in and out of catacombs like moles and eventually manage to capture all of the Germans, which, of course, leads to another celebration.