I got a copy of the change-logs! Here it is! :
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Entrenchment version change log
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Gameplay / Balance:
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-Really huge Starbases
-Really big Starbase weapons
-Really big Starbase butt-kicking ship
-Mega Scout-trashing mines
-Super upgrades for Defence Turrets & Hanger Bays
-Capitol Ship Escape pods (for new players who did not read the above change-log).