The Forge is often the first unit deployment structure built by players. It focuses mainly on Energy cost for units, having the A25-Roman and Scout available. It can later be upgraded to the Manufactory.
The Forge allows for the construction of A25-Romans, the answer to Marines, and Scouts, a powerful unit that is dangerous even into the later game.
Often the first unit deployment structure built, the Scouts offered are very effective even against other units later in the game due to fast reloading shots and are easy to spam in large amounts.
A key unit is the Scout, which is most effective against Chronite armor. Although Marines may be a threat, with proper kiting and micro, it is possible to win this battle and gain battlefield control.