The strategy and tactics of guerrilla warfare tend to involve the use of a small, mobile force against a large, unwieldy one. The guerrilla force is largely or entirely organised in small units that are dependent on the support of the local population. Tactically, the guerrilla army makes small, repetitive attacks far from the opponent's center of gravity with a view to keeping its own casualties to a minimum and imposing a constant debilitating strain on the enemy. This may provoke the enemy into a brutal, excessively destructive response which will both anger their own supporters and increase support for the guerrillas, ultimately compelling the enemy to withdraw.