All players can create platoons consisting of two players as an alternative to the traditional three tankers’ platoon. The notable thing here is that the platoon leader doesn't have to invest Gold or Credits and does not require a Premium Account.
To form such a platoon you need to follow the steps described below:
After you have created platoon, you'll see two special windows in your garage: Invite to Platoon and Platoon.
NB! You can limit the list of those who can invite you to a platoon. What you need to do for it is to go to World of Tanks settings and in the Game section tick the box in front of “Accept invitations only from players in friends list”. Then press OK at the bottom of the window:
NB! To invite the third player to join the platoon the platoon leader needs to have a premium account!
Good luck in World of Tanks!