The Republic of Mannerheim was a star nation in the influence sphere of the Solarian League.
It was secretly controlled by the Hurskainen family, one of the Mesan Alignment's genetic Alpha lines. (HH12)
The Republic was governed by a President. As of 1922 PD, the office was held by Stanley Hurskainen, descendant of a Mesan Alpha line and member of the inner circle of the Mesan Alignment. (HH12)
The Mannerheim System-Defense Force was the fleet component of the Republic's military, and by far the most powerful of the Alignment's component navies as of 1922 PD. (HH12)