nobbis writes:
"From 'A Tolkienist's Perspective Blog' : a two part article part 1 part 2 about the military structure in Mordor. There is a hierarchy chart if you want a summary.
Was the rapid collapse of the military following the destruction of the ring indicative of the fragility of this structure , and its susceptibility to a decapitation strike ? Would a flatter hierarchy or something similar to the Imperial Military or Starfleet have been more resilient?"
(Score: 2, Informative) by Joe Desertrat on Monday March 10 2014, @07:44PM
Sauron and the Nazgul controlled mostly by fear. The orcs didn't like the Nazgul but obeyed them. Now imagine suddenly that fear and all leadership was suddenly removed, as well as towers crashing down, the mountain destroying itself, etc. The idea of of an army continuing to press an attack under those conditions is remote. Most would probably immediately take flight for anywhere but there. Assuming the men of Gondor were still organized any small, dispirited resistance would be easily mopped up. Further down the road the slave farms would have likely been in revolt, those paying tribute to Sauron would be looking out for themselves instead, etc.