War is all about who has the better weapons, tanks, airplanes or ships at a given time. Sometimes just a release of a new thing would create an advantage.
All multiplayer games have to deal with this.
If a game was only A against B, and A > B, we would just need to nerf A or buff B.
But imagine that in a 3-player game, B > C, but even so C > A, how would we fix this?
If we boost A, cause it looses to C, then B would just get destroyed when playing A, etc.
Sometimes A, B and C are just diferent, and will never get perfectly balanced.
Game balance issues are the most common theme in a multiplayer game.
Some of the funniest videos are about it... for example
world of warcraft...
https://www.youtube.com/watch?v=tRGDcwOxBzYhearthstone...
https://www.youtube.com/watch?v=dWA71iBD0-Aleague of legends...
https://www.youtube.com/watch?v=Lnowbp88lwISo tournaments create some workarounds...
Like forcing a player to choose 3 ships, and when it wins with A, then it can only play with B or C next.
Or if a player won, then in next game he is the first player to choose a ship, so the other can counter it with a better choice.
Or like in chess, white has an advantage, so they switch sides each game.
People add clocks, restrictions, so the game can end in a draw, etc...