I have an idea, but execution will take a little time
After Nod moved in on an old Trainyard base, a GDI team was quickly dispatched to find out what they were up to. Nod had been excavating the nearby railway tracks to recycle, and had left long empty ditches all over the nearby plains. On one particular day, a powerful ion storm rolled in, and both teams were left without communication to their command. It was a twist of fate that this was the same day that the Nod force finally detected the GDI presence, and fighting ensured. Due to the storm; both sides were limited to ground troops only, and so a strange battle played out in the excavated railway ditches - one in the style of the ancient trench battles of the 20th century.
(Contrary to what you suggested this is the first time I've used pixelart to draw a map )