Does Hitting City on Small Maps Affect Factories?

[MRPLUTO]

I know destroying the city/cities slows down the HQ rebuild time on all maps, and also the factories in each zone on large maps, but does it affect the factories on the small maps?

MRPLUTO

P.S.  Also, does each percentage change in factory or city destruction affect rebuild times, or is it in larger increments?  Is there a threshold that must be reached before there is any effect?

Thanks.

[MOSQ]

Yes. The rebuild time system was in effect before we ever had the large maps. What the large maps brought in was the Zone system, where factories, cities, and bases are tied together in a zone for effect, not country wide as on the small maps.

It's all explained on the AH help web pages.