Crusader Warfare is generally classified as "A War defined by the presence of a certain objective or goal". Such wars, on average, are made from a certain religious perspective. Called by a certain organization, mostly religious, they gain their recruits not only from the regular armies, but from citizens. Usually disregarding nationality, these crusades are wars that take place in the name of an organization, and thus any member of the organization is qualified to take part in the war.
A prime example of crusade warfare is the Crusades of the Middle Ages. During this period, a organization, namely the Roman Catholic Church, called for a certain objective to be fulfilled, in the case of the Crusades, the objective was the retaking of the Holy Land.
Crusade Warfare is, historically, directed against a single, established enemy. If no direct force is to be engaged, the force of a nation that harbors the enemy might be attacked.
This type of warfare draws the highest concentration of zealous fanatics. The wars might continue for a long time, especially since the warring force might feel compelled to continue the war, even in the face of defeat. Also, a Crusade War might engage more diverse populations of people, as all the classes feel somewhat obligated to join in. More examples of Crusade War can be found in the terrorist activity in the Twentieth Century, the Thirty Years War, and the conquest of the Americas by Spain, although signifigant claims can be made against either one of these.
The typical weapon of a crusader is whatever he or she brings with him. Although some crusading forces, mostly the regular armies of nations, possess weapons, in reality a crusader must take what he or she gets. If no weapons are available, then let it be. The classical image of a crusader is the medieval knight, armed with a chain shirt, lance and sword, and large shield, most often depicted on horseback. The classical crusader practiced chivalry and honor--to a point--although by no means is this necessary for a Crusading warrior.
