A pitched battle or set-piece battle is a battle in which opposing forces each anticipate the setting of the battle, and each choose to commit to it. Either side may have the option to disengage before the battle starts or shortly thereafter. A pitched battle is not a chance encounter such as a meeting engagement, or where one side is forced to fight at a time not of their choosing such as happens in a siege or an ambush. Pitched battles are usually carefully planned, to maximize one's strengths against an opponent's weaknesses, and use a full range of deceptions, feints, and other manoeuvres. They are also planned to take advantage of terrain favourable to one's force. Forces strong in cavalry for example tend to favour ground favourable to cavalry, and will not select difficult swamp, fo