Some better quality images I was able to find:
to defend against the republicans
You mean the Nationalists. The anarchists were on the Republican side.
Those are some cool looking designs. I especially love the second pic. The holes at the front make it look very intimidating as if it has eyes that are watching the enemy.
Didnt they end up fighting too?
So what you're saying is...
Anarchists are the original tankies
Last pic in the list, Hippo-mobile. 
===============/c/cars================
Hexbear's premier community for the discussion of and questions about cars, motorcycles, and other low occupancy transit. Share your thoughts, discuss cars under communism, and ask questions about maintenance.
Anti-car posting is not permited. Train good car bad and all, but it's not what this comm is for.