Backdoor (Sneak)

A backdoor, commonly referred to as BD in RoR and sneak in AoE, is when a player builds a base inside or behind the opponent(s). Depending on the player's goal, the size of a BD can range from a single town center (to mine resources) or to a player's entire military comprised of 50 barracks.

Different types of BDs work against different types of players. For example, if you know your enemy