How powerful is Sadera's military might compared to other medieval fantasy countries in fiction?

While it is obvious that the Saderans would lose to nations with more highly advanced tech, it seemed like they could still dominate other medieval fantasy nations. So I've been wondering how Sadera's military might can be compared to other medieval fantasy countries in fiction and whether or not if Sadera is the most powerful medieval fantasy nation in fiction or if there are other much stronger medieval fantasy powers that could challenge Sadera.