I'm kinda sad that two users missed the Queen reference. Let Us Cling Together may be referring to Tactics Ogre, but Tactics Ogre is itself referring to the band Queen. It's been confirmed that the director of the series named the games after Queen songs/lyrics. Their song Teo Torriate has a lyric that is "let us cling together." Queen also had a song called Ogre Battle. Granted, these are older Queen songs from their earlier progressive rock days.