First Impressions

It's a bit strange; I can't select a Fortress like in Heroes VI – to order troops and so on. It suggests entering with a hero, although on the map itself, organizing caravans is possible from the Fortress. In general, I haven't figured out this system yet... And by the way, I understand that the units from the additional campaign about Axoth (like the White Tigers) are not available in the regular game (in Ashan)? I didn't find them in the Encyclopedia, although it has been updated – the Dwarf faction and new neutral creatures have been added.