There are 2 things that are VERY classified when it comes to US military.
First is missle defense capability
Second is sonar.
I believe something like 10 years ago, the declassified sonar capability was that it could reconstruct a 3d image of a goldfish 10 miles away.
TLDR; US is never going going "win" wargames because its not a good idea to showcase the true capability. Same reason why F22 and F35s "lose" to other jets - US purposefully nerfs them and flies them at decreased envelopes.
First is missle defense capability
Second is sonar.
I believe something like 10 years ago, the declassified sonar capability was that it could reconstruct a 3d image of a goldfish 10 miles away.
TLDR; US is never going going "win" wargames because its not a good idea to showcase the true capability. Same reason why F22 and F35s "lose" to other jets - US purposefully nerfs them and flies them at decreased envelopes.