Has it been mentioned that this game had a LOT of units? Cavedog used to run 'Boneyards' (similar to Blizzard's 'Battlenet') which was the optimal place to enjoy T.A in multiplayer.
This game was best experienced with the expansion 'The Core Contingency' - or 'C.C' (eg: Submersible Aircraft, Anti Radar and Anti Sonar units, more Submarines, AA Ships.) together with still more official downloadable Cavedog units (eg: FARK's, Mobile Anti-Nuclear Missile Units). The game made up for this by having a LOT of units (Air, Naval, Ground, Amphibious, Commanders that nuked themselves when they died) and buildings (particularly a massive number of fixed gun emplacement types), (effectively) endless resources (Metal and Energy), and comprehensive control options.
There were only two sides - 'The Arm' and 'The Core' - cloned humans and robots respectively with essentially similar units, although Core units tended to be tougher and slower.
Chris Taylor's 'T.A' (Cavedog 1997) is slightly famous amongst RTS enthusiasts for being a ground-breaking real time strategy game.