Second Frontier War (615 to 620)
Fought between the Outworld Coalition
and the Imperium during the period of
the barracks emperors. Arbellatra (587 to 666) was named
Grand Admiral of the Marches
by Cleon V and led the combined local
and Imperial forces to defeat the Coalition, and then he proceeded to reestablish
the central Imperial authority. She was named regent in 622 as a result,
and Empress in 629.
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