There is a wealth of activities involved in upgrading your vehicles, aircraft and weaponry. This page is a hub for this activity and will expand regularly.
Dogfighting each Tuesday; practice & learn with other players in matched aircraft. 9pm GMT / 10pm EU / 4pm EST.
Hangars allow you to store / upgrade aircraft, develop upgraded air weaponry and accrue Air Cargo for bulk sale.
Underground bases giving you access to The Doomsday Heist, and storage space for the new Mammoth Avenger.
Gunrunning, Mobile Operations Center, weapons/vehicles workshops & developing military hardware.