A battle is defined as a significant military engagement,
excluding sieges and urban warfare, which took place before 1800 A.D.
and which involved in the order of one thousand or more combatants.
Military engagements which involved lesser numbers of combatants may
be included where they are considered to be of special historical or
archaeological significance. A battlefield is the identifiable and definable
geographic area(s) where a battle took place. For mapping purposes its
extent is determined as the outer limit of the area(s) within which
the majority of the fighting took place and may also include any directly
related sites intrinsically linked with the conduct, command or direction
of the battle.