Once the Earth Kingdom refugees caught whiff of the smoke they realized that there was nothing they could do to prevent the attack. Instead, they risked their lives and tried to slow down the FN burning as much as possible, causing casualties to the Fire Nation. We always keep fighting to the end; we're a gutsy nation This didn't stop the burnings, but it did, as I stated before, cause some casualties to the FN.
As far as the 10000 slave army, hopefully they have refused to fight after they heard of the Earth Kingdom Refugee's determination. But if not, we will have to fight back. Once the 500 FN soldiers are killed, the slaves run around in panic, not knowing what to do. These slaves are fighting for absolutely no reason, and since the 500 soldiers threatening them to attack are now dead they surrender immediately. Of course, by then, there are only roughly 2000 slaves yet. It was hard to spot all of the FN soldiers, but some of the slaves helped us pin point them.
These slaves are taken in to be trained in the non-bender part of the military. They are nursed back to health and are eagerly training to get back at the Fire Nation. This adds a significant amount of soldiers to our army.
The Screaming Badger's will sneak 500 of the EK's most loyal metalbenders onto the FN's navy ships. The chaos the fire muffles out any sound that the badgers would have ever made. The metalbenders wait until the ships are safely out to see. They use their metalbending to fight kamikaze style. They take out most of the FN ships, but not all. This cuts back on the Fire Nation's required wealth considerably.
Ba Sing Sei and Chameleon Bay still remain the two most guarded places in the entire Earth Kingdom. As I stated before, 5 new hatcheries have been constructed to bread more badger-moles as well as new factories to create sandships.
I think that's it