The involvement of Atlantis would be the following campaigns....
War entry in November 1914
Galipoli (Gabe Tepe) including Dardanelles Assualt
Mesopatamian Front
Western Front late war (191
Either Italian Front or Salonika front (Greece)
Italian or Salonika involvement would depend on Italian and Greek involvment in our alt history and I'd have to talk to said nations to hammer out a timeline.