Board Thread:Wiki Discussions and Support/@comment-25626003-20141125145958/@comment-17623-20141125152938

No. They were missing-nin, thus not technically not affiliated with any village, (despite where Itachi's loyalties were).

Basically Itachi, Sasuke, the Kages and the Sage of the Six Paths were all neutral parties in the war. They fought alongside the Alliance, but they weren't actually part of the alliance.