Of course, it's a little harder to change the rules in the real world

In the days since the encounter with five Iranian patrol boats in the Strait of Hormuz, American officers have acknowledged that they have been studying anew the lessons from a startling simulation conducted in August 2002. In that war game, the Blue Team navy, representing the United States, lost 16 major warships — an aircraft carrier, cruisers and amphibious vessels — when they were sunk to the bottom of the Persian Gulf in an attack that included swarming tactics by enemy speedboats.
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General Van Riper’s attack was much more complex and sophisticated than anything that could have involved the Iranian boats last weekend. The broad outline of the 2002 war game was reported at the time, but in interviews since last weekend’s episode, General Van Riper and other officers have provided new details about the simulation.

In the war game, scores of adversary speedboats and larger naval vessels had been shadowing and hectoring the Blue Team fleet for days. The Blue Team defenses also faced cruise missiles fired simultaneously from land and from warplanes, as well as the swarm of speedboats firing heavy machine guns and rockets — and pulling alongside to detonate explosives on board.

When the Red Team sank much of the Blue navy despite the Blue navy’s firing of guns and missiles, it illustrated a cheap way to beat a very expensive fleet. After the Blue force was sunk, the game was ordered to begin again, with the Blue Team eventually declared the victor.