The Travian itself describes it as realtime strategy. But looking at the classic one like Dune 2 or StarCraft, Travian is definitely something else.
The Wikipedia has nice list of categorization but is it missing one for Travian.
For clarification the question is about realtime not the strategy part. For example most of the shooter games are realtime. Realtime usually means quick decisions and some dexterity skills. Travian and ogame lacks of both.