The idea is simple, meant to make the game more fast paced and make every move have that much more impact. I'm not saying this isn't how things already are, this change would just give each move that much more gravity. Anyway, here's the idea:
Each turn is treated as taking place in Fall.
In other words, each turn ends with a build phase.
For example, year one would take place as follows:
Spring 1901 Movement
Spring 1901 Retreats (can't happen in Spring 1901 but anyway)
Spring 1901 Build
Fall 1901 Movement
Fall 1901 Retreats (if necessary)
Fall 1901 Build
I have too much on my plate to GM something right now, but I could act as a player if turns were something like 48/24/24.