Introducing War Factories:
This new building provides the region with one military factory.
Construction costs: 5000 3200
Max buildings per region: 5
convertable : No
Supply use: +0,3% +0.6%
Military factory build speed: +2%
Atrittion: +0,2% +0.4%

When it says attrition and supply use does this mean troops in the field experience more attrition and supply use as a negative impact of building this?
or does that mean they have less?
or is it just for troops in the same sector or?