As you level up your soldier in Call of Duty: WWII Multiplayer, you earn various currencies used to buy or unlock more advanced gear and customization items. Here is a breakdown of the different currencies and what you can do with each one.
Visit the Mail station in Headquarters to collect Armory Credits, your soldier's wages. You can collect 100 Armory Credits every four hours. Armory Credits can also be earned for completing Orders.
Use Armory Credits to purchase Contracts from the Quartermaster to earn even more rewards. Armory Credits can also be used to purchase items in Collections. Completing a Collection nets you a special Epic item.
Every rank you achieve in Multiplayer also get you a Rank Unlock Token. Use these tokens to unlock Divisions, Basic Training skills, Weapons, Equipment, and Scorestreaks. Items will remain unlocked until you enter Prestige.
The General rewards you with a Prestige Unlock Token every time you enter Prestige. Like Rank Unlock Tokens, Prestige Unlock Tokens are also used to unlock Divisions, Basic Training skills, Weapons, Equipment, and Scorestreaks. This time, however, you unlock an item permanently. So, if you really like that one gun that you can’t use until Rank 51, you can use a Prestige Unlock Token to make it available at Rank 1.