You may be interested in this AMA on Spanish Civil War where u/Georgy_K_Zhukov, u/k1990 and [u/tobbinator] (https://www.reddit.com/user/tobbinator) deal with the topic of Anarchism in Spanish Civil War. They list a number of academic works in their references which may be useful to you.

Maybe you've already read it, but George Orwell fought in the war among anarcho-communists (specifically, the POUM) and describes his experience in his 'Homage To Catalonia'. Describes what it was like fighting at the front, how the people acted in towns and the city at various points during the revolution and also the power struggles amongst the various anarchist and soviet-backed groups.

Critique of Orwell is that he is a bit of a romanticist, but this first-person diary of what actually went on among the people in revolutionary Catalonia is mostly correct save for a few details and it's a good read.

One of my favorite excerpts::

“The essential point of the system was social equality between officers and men. Everyone from general to private drew the same pay, ate the same food, wore the same clothes, and mingled on terms of complete equality. If you wanted to slap the general commanding the division on the back and ask him for a cigarette, you could do so, and no one thought it curious. In theory at any rate each militia was a democracy and not a hierarchy. It was understood that orders had to be obeyed, but it was also understood that when you gave an order you gave it as comrade to comrade and not as superior to inferior. There were officers and N.C.O.S. but there was no military rank in the ordinary sense; no titles, no badges, no heel-clicking and saluting. They had attempted to produce within the militias a sort of temporary working model of the classless society. Of course there was no perfect equality, but there was a nearer approach to it than I had ever seen or than I would have thought conceivable in time of war.”