It is currently in beta testing. You have the option of joining an army or creating one yourself. Armies will battle against each other, with the winner taking the losers' possessions as well as their pride. If being in boot camp doesn't appeal to you, you can still go through Redmoon by yourself. Armies are not the only ones who can share items and money.
Players can use post boxes to send a message along with items to others.
If extra items are weighing you down, you can store the surplus goods in your own personal bank account. Banks are usually found in the vicinity of Hospitals, so you can deposit that silver ring you got right before the spy cut you down.