Trial by combat refers to a trial that is decided by personal battle between the common people in Europe and England during the middle ages. It is a trial in which the person accused fought with the accuser. It is the idea being that god would give victory to the person in the right. This is the method that was introduced into England by the Normans after 1066.
However, trial by combat became obsolete several centuries before being formally abolished in 1818, having been replaced in practice by the grand assize and indictment. It is also known as judicial combat or wager of battle.