Good thing I didnt outright say it then hehe. Watch it, you will be suprised, hehe.
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About dividng their big forces to two different shores, it wasnt like they were great tactical in those darker ages, but they clearly did it to stop the vikings from landing on the other beach if they all camped on a single one. Though yeah its kinda dumb to be super suprised that the vikings would attack the smaller army, even if they are foes they never faced before and hence are unprepared for.