Quote Originally Posted by Manco Capac
Though there are many sparsely populated, non thoroughly explored and outright dangerous regions on the map, not just in scandinavia. Many of the siberian, german and desert provinces would be dangerous for an army to march across, though a ruler would claim these lands as part of his dominion some of the local folk might think otherwise. In view of this I do think the landbridge is valid, in any case it is just as valid as sending your men via ship from Scotland to Palestine in one year, or sending a crusade, well anywhere which is why I do think it's a valid landbridge.
Totally agree on that part.

The names of the viking units is a tough one, mainly since there were no viking "units", raids were just composed of men from different social classes. In all honesty, the Viking Carls (or Carl Swordsmen) should be removed as only the very social elite (the cream of the cream) could afford swords, but I guess that'd make the game somewhat out of balance.
The Thrall unit seem fit. The Landsmenn could perhaps be renamed to Drängar (dräng=singular, drängar=plural). In modern Swedish dräng would be the equivalent of farm-hand actually, but they were a form of elite warriors in the army of their (often local) lord or king.
Huscarles is another term that does work, however I think that Tegnar (tegn=singular, tegnar=plural) would be somewhat more appropriate. Tegnar were in many ways the same as vassals to the king, who gained land from him, and this land remained in family of the tegn even after his death.
Huscarl is a term that belongs in the dark ages, the viking adapted the Tegn-system from England, do give the impression of being civilized christians. Tegn itself is in fact only a scandinavian from of the anglo-saxon title "Thegn".