11 Types of Conflicts

As identified by Black's Law Dictionary

Civil War
Imperfect War (An inter-country conflict limited in terms of people or places)
Irregular War (like insurgencies)
Just War (bellum justum)
Mixed War (Armed groups versus nations)
Perfect War (One country against another)
Private War (between warlords)
Regular War (WWI and WWII)
Revolutionary War
War of Aggression