敵わない[kanawanai] no match for
怨敵[onteki] sworn enemy
外敵[gaiteki] foreign enemy
敵う[kanau] to come true (wish)
仇敵[kyuuteki] bitter enemy

敵討[katakiuchi] vengeance
敵同士[tekidoushi] mutual enemies
旧敵[kyuuteki] old enemy
強敵[kyouteki] formidable enemy
公敵[kouteki] public enemy

一軍[ichigun] an army
１等軍曹[ittougunsou] sergeant first-class
一泊行軍[ippakukougun] an overnight march
援軍[engun] reinforcement
海軍[kaigun] navy

凱旋軍[gaisengun] returning victorious army
救世軍[kyuuseigun] Salvation Army
共産軍[kyousangun] communist army
郷軍[gougun] veteran
空軍[kuugun] Air Force