I sense real potential in this story. The former ally turning against the hero is a powerful premise. Also there are several major obstacles to overcome: famine and a villain. The famine is the backdrop, much like the war in a war movie. The real drama is between the characters. However by putting the famine upfront in the logline, you're weakening its dramatic power.
So an issue is the order in which you reveal the story information. The story really starts when the dictatorship is installed, which is only mentioned towards the end of the logline. I like when events in a story are revealed more or less (chrono)logically in the logline. That way it makes sense while we're reading it and we don't have to re-read too often.
"a young tribe leader must defeat his demons, both real and imagined" is the heart of this story and logline. Two problems here: 1) the 'imagined demons' refer to the character fears/flaw/weakness. In that sense, the statement is generic because pretty much every hero in every great story has to defeat their inner demons. 2) the real demons are at first not specified, then later in the logline you clarify it is in fact his second in command.