'And war broke out ... and Michael and his angels fought with the dragon... but they did not prevail.' Rev 12:7-8; This icon is at entrance to The Cave of The Apocalypse here in Patmos + many, even Christians? are confused about who 'they' are?

The dragon/devil/Satan/serpent is the one who is defeated. The war was won on The Cross; Christ is our victory; battles are yet ongoing, but Light always prevails against darkness!