Colored Numbers

[tgb1]

What do the colored numbers on some of the cities mean? I can't see anything corresponding in the tooltip.

[Dobey]

I've just started playing, so I'm no expert, but I think they might be the number of tuns a fortress has been under seige.

[lodilefty]

Cities and Towns
 Cities are identified on the map with a name, a particular symbol, and 2 numbers :
- production (in red box)
- and military recruitment (in blue box), if the city is isolated.
 Each city also has a numerical value for National Will (NW), indicated in the center of a yellow circle.
 The names of country capitals are identified by their national flag in that region.
 “Objective” cities are identified by a star next to their name, and are highlighted with the Strategic Map Filter [F2].
 Towns are urban localities, without a direct effect on the game (movement, combat, etc.), except for several that have National Will (NW) (ex. Verdun). They are used essentially for supply, the placement of units in scenarios, and for movement by rail. They do not show prooduction or recruitment numbers.