Supply lines

Supply lines were an upgrade for the USA supply center, supply drop zone and the oil derrick.

Effect
The upgrade increases the cash flow of all these buildings by 10%.

Trivia

 * While this upgrade is shown to affect the USA supply center, it actually affects the Chinook itself. This can be observed when the player has another faction's supply building/collector. Supplies dropped by Chinese supply trucks/GLA workers at the USA supply center will stay the same, while supplies dropped by the Chinook at Chinese supply center/GLA Supply Stash would be increased.