Like I said to the sibling comment, look up the CNT-FAI, the EZLN, the YPG, and the Revolutionary Insurrectionary Army of Ukraine. There is nothing wrong with having the federation create a militia for the purpose of self defense and furthering the revolution
What prevents a repeat of the Articles of Confederation? It was supposed to be exactly this kind of setup, but the federal government didn't have any authority to enforce the states providing funds, and the states tried to avoid their responsibilities so someone else would pay for it. This resulted in the federal army not having the funds it needed to do its job.
And once the federal government got the power to ensure it could fund itself, it has bit by bit expanded until it completely dominates the states.
How do anarchists propose to ensure the central military force is able to, at the same time, ensure cooperation by its members, and also can not come to dominate them?
Pierre-Joseph Proudhon was the first person to use the term Anarchism to describe the political philosophy that we (anarchists) believe in. He was born the same year Thomas Payne died. So while Payne wouldn't have described himself as an Anarchist, we definitely recognize that he was in many ways espousing Anarchist philosophy.
I'm not familiar, and Google doesn't seem to bring anything up under his name or under fractalistic societies. Unless you mean Nassim Nicholas Taleb, the author of Black Swan? If so, I'm also not familiar with his work outside of knowing about that Book.