Frank Keplacki's 'Industrial.mp3' of Command and Conquer: Tiberian Dawn was helpful in inspiring this drawing. Music here: [link]
The story behind this region is that this was once enemy held region, with the heavy industry behind making tanks at least five times bigger than those used by the current occupying force (aka the 'Allied Forces'). The Allies have modified the factory equipment to mass produce their own tanks and ammunition.
Newly manufactured main battle tanks parked in the foreground, mass production of new tanks in the far background.
The railway gun (runs on 4 rails) near the blast furnace is captured enemy equipment, the 9 armored diesel engines (Panzerzugs, info here: [link]
) are the Allied Forces' own.
The desert climate continent they are on is still being fought over in a nearby region (where the Allied Forces air units are headed), so tactical headlights are a must for all vehicles.
Damage from the battle to take over the industry is still visible, as well as makeshift repairs.
The Hummvee at the lower foreground appears to sink as it is on lower ground while the trains are running on a raised railbed to distribute the massive loads.
Daylight condition is evening.
Update 26/05/2012: Added a couple of soldiers playing poker, white hot steam escaping from steam generators behind the blast furnace, piles of rubble, wear and tear and rust on the armor trains, lights in the factory, and worn out rails from frequent use. I decided to keep it to two personnel so that they don't steal the limelight of the towering war machines around them.
Update 24/06/2012: Updated with feedback