I remember looking on Reddit or the like about how a speculative map shows that Gilead proper is really only the Midwest and Northeast. The rebels control most of the borders along Canada. The South and areas east of the Rockies are where the fighting is. By the looks of things major cities like Los Angeles, Portland and Seattle (if they weren't destroyed, do we even know TELL US ABOUT THE REST OF THE DAMN CONTINENT) were rebel controlled. The main toxic waste colonies were shown to be where the cities of Phoenix and St. Louis were.
Again this map was a theory based off what someone saw in an episode but rebels controlling the west coast would explain supply flow since they would likely not be part of any embargo. It would be nice for the Americans to officially reclaim states and California, Oregon, Washington and Idaho would likely be the first they get back.
If they are going into the epilogue portion then the security in Gilead gets worse doesn't it? I wonder if S4 will begin with a mass execution of old commanders as was explained in the book since the second generation were more devout.
Also there seems to be a trend of a major female character getting out in the finale. S1: Moira, S2: Emily, S3: Rita. Hopefully in S4 June can get another in her circle out like Alma, Janine or Brianna.