Resource management is paramount to leading a successful campaign. Various aspects of gameplay consume different resources. The main items you will encounter and use are listed below:
Gold: currency used to purchase goods in Shops, and to upgrade Units
War Bonds: currency used in Armory and financial asset exchangeable for Gold, Supplies, and various gameplay functions; able to be purchased with real currency
Supplies: The costs of battle; engaging in battle will consume supplies
Dog Tags: currency used in Tank Hangar shop
Oil: item used to upgrade tech, base buildings, etc.
God speed soldiers. The world is counting on you.