The effects making the headlines around this paper were occurring with GPT-4-base, the pretrained version of the model only available for research.
Which also hilariously justified its various actions in the simulation with "blahblah blah" and reciting the opening of the Star Wars text scroll.
If interested, this thread has more information around this version of the model and its idiosyncrasies.
For that version, because they didn't have large context windows, they also didn't include previous steps of the wargame.
There should be a rather significant asterisk related to discussions of this paper, as there's a number of issues with decisions made in methodologies which may be the more relevant finding.
I.e. "don't do stupid things in designing a pipeline for LLMs to operate in wargames" moreso than "LLMs are inherently Gandhi in Civ when operating in wargames."