As any self respecting Comics Artist will tell you, there are few words in the English language that can inspire more dull, gnawing dread than the word 'Army'. Such a small word, so easy to write, yet such a MAJOR pain in the ass to draw!
In this case the script specified 2 armies ( plural , even WORSE! ) viewed from overhead ( !! ). This is the kind of direction that undermines the Writer/Artist working relationship. Do you hear me Morrison!!!!