The United Nations Peacekeepers Medal (Irish: "An Bonn Chosantóirí Siochána na Náisiún Aontaithe" ) is awarded to those members of the Irish Defence Forces or Chaplaincy Service who have served overseas on a United Nation Mission or United Nations Mandated Mission.
United Nations missions involve travelling overseas.
This is not always correct, some United Nations missions may take place within the home country of United Nations peacekeepers, in which case they would NOT have to travel overseas. The algorithm likely got this wrong because the text mentions that the medal is obtained by travelling overseas.