Talk:Units/@comment-5314399-20120721025020/@comment-69.181.80.27-20120721055750

The total amount of SP required to promote a unit is split in 10 smaller factions. Every time the topmost bar is completely filled up, 1 out of the 10 factions is completed, and that's what's shown in the "segmented bar" underneath it. It's really just to give you a better estimate of how much SP you still need before you can promote your unit.