A better description of the Millennium Challenge comes from War Nerd's doppleganger War Tard:
In 2002, the Pentagon tried to suppress the findings of a huge US war game called "Millennium Challenge" where the US Navy (Blue Force) was pitted against a "hypothetical rogue state" (Red Force) in the Persian Gulf region. Red Force was led by Lt. Gen. Paul Van Riper, a total bad ass, whose job was basically to play the role of the butt raped lesser nation at the hands of the mighty technology of the all powerful US Navy. Instead of following the script, this Van Riper guy went off reservation and went all asymmetrical on Blue Force's ass, an ass which consisted of a full US Navy carrier group.
Though the rules stated both commanders could use any rule in the book, the brass didn't expect the shit Van Riper pulled. Once the war game was up and running Van Riper's force disappeared off radar. He relied on couriers instead of radio to stay in touch with his field officers. The US navy cryptographers were rendered useless in a single blow. He employed novel tactics such as coded signals broadcast from the minarets of mosques during the Muslim call to prayer, a tactic weirdly reminiscent of Paul Revere and the shot heard round the world. He even used carrier pigeons to deliver messages to some of his commanders. God I love this guy! He then launched a daring attack against the US Blue Force carrier group by hundreds of kamikaze speedboats some of which were armed with Chinese Silkworm anti ship missiles. I shit you not. The result was a carrier and two helo carriers sunk along with 13 other assorted ships, the worst defeat of the US Navy since Pearl. The Pentagon had a shit fit and scrubbed the whole exercise, dismissed Van Riper and replayed the whole thing this time making Blue Force 'win'. Basically, the navy brass pretended it never happened. Lunatics in speedboats apparently don't count and are considered 'cheats'.
You put a 5-billion-dollar aircraft carrier up against, say, five hundred incoming rockets, drones, torpedoes, remote-controlled boats, and tiny speedboats - only one of which has to be carrying explosives, the others can all be decoys there just to fuck with your radar operators - and what you have is a 5-billion-dollar submarine. Total cost of the attack, let's be extravagant and say one thousand dollars.