I came up with the following idea after writing a vignette and doing some preliminary worldbuilding. Its overarching storyline involves a once powerful and tyrannical empire's disintegration and ultimate collapse at its former victims' hands. The original empire has already fissioned into three sub-empires (West, East, and South) after growing too big for its britches, and each of these smaller empires suffers from attacks from neighboring cultures. What I want to ask is how I go about relating these international conflicts in the form of a story or series of stories. My idea is to use multiple PoVs, some from the leaders of the major factions (in order to show the larger geopolitical forces at work) and some from commoners (in order to show what effect said larger forces have on the populations involved). Has something like this been done before? I'm not asking whether my idea is original, but rather whether there are any successful models I can study and dissect in order to better pull off my own story (or series of stories). My second concern is that using so many PoVs in a book would confuse readers. As much as I would like to show all sides of each major conflict, I don't want to give my readers too many character arcs to keep track of.