Donatia

Also know as D'natia, it is the allied country known to be east of Nil Kamui, which protected the towns only in which they had military bases during Kouran's Invasion.

Trivia

 * Donatia's real world equivalent is America, as is seen by the location (the east), it's description, the 'ally nation to the east' (Ally might a reference to the Allies of WW2) and the names, Swallow is an American name.