This mod originally started as a simple tweak, allowing cavalry to upgrade into tanks so they didn't just deadend. It soon ballooned in scope and evolved into the form you see today, a total sweeping balance update to the existing game without adding or removing any content. Improvements have been made to units, wonders, buildings, worker actions and even resources! A full changelog can be found in a .txt file in the mod folder.
Skipper's Tweaks 1.4.2
This mod attempts to balance many lackluster options in Civ3, providing a more varied experience