The problem with SS and DLV if you're looking for another EB is neither have historical accuracy as a priority. Stainless Steel is focused on AI improvement, bugfixes, gameplay, and graphics, with historical accuracy coming in far behind behind those aspects. DLV is ultimately focused on the roleplaying elements. It is true that the scripts and character roleplaying elements do help to improve historical accuracy in some areas, but when I played DLV campaigns I was bothered by some of the oversights that really hurt the historical accuracy (for instance, they had the wrong person as ruler of the Siculo-Normans at game start; in fact I think in real life he had been dead for 15 years before their mod started). There were more issues like this, and they may have fixed some of them, but the fact is DLV was never meant to be a historical realism mod and if that's what you're looking for you won't find it there.
Right now, I'm pretty sure Broken Crescent and Chivalry II are the only two completed mods for M2TW that focus on historical accuracy for a large region (as opposed to a small, regional campaign). Admittedly ChivII is not as historical a mod as EB or BC, but it does try more than most. Dominion of the Sword will obviously focus on accuracy as well when it comes out.
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