Some men or women devote their entire lives to one cause or the other. Others bend with the wind flittering from one camp to the other as times change others just enjoy screwing people over. Who do you think has played for the most sides??
The obvious answer would be Alcibiades whom no one was ever sure which side he was on flitting between Athens, Sparta or the Achaemenid Empire.
I just learnt about Otto Skorzeny who on the surface would appear to simply have just been a loyal Nazi soldier; but it was after the war when he really began to play the game. As far as we are aware he worked for an ex-Nazi organisation, the KGB, the CIA, Mossad (yes he did) and even the Papacy, and that's just the organizations that we know about.