Sorry. Still need to do military yet.

Okay, I am [i]completely[/i] lost again. It seems that every single time I look at the rules they've been changed. 

Are there three seasons, or four? The rules say four, and I am 100% sure that at one point they said three; I know this because I calculated my peasant's crop consumption accordingly. I'm not touching my sheet again until I'm absolutely sure that the rules are as they are shown.