There arenīt many files needed to be changed!!
I just did that and will include that into my mod as the capture of Gdansk is a bigger part of my campaign. But what I did is not just change some files and then start at that time.. historical traffic (sub patrols, minelay operation), radio message is also important I think.
So.. if you want to... you have to look into "data/cfg/flotilla.cfg", start time and patrol areas have to be changed.
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