The quarterstaff is effectively a long two-handed club, although its weight distribution is generally even throughout its entire length (some forms did have weighted tips, however). It was used both to deliver crushing blows, and to thrust like a spear. The art of using the staff was closely related to that of other polearms, and it was often employed as a training weapon for the latter. Moves include many different forms of blocks, thrusts, strikes, and sweeps.
[edit]
History
The staff being a very simple weapon to manufacture, it has a long history of use, and a wide cultural dispersion. The staff is a traditional weapon of many Asian martial arts. The quarterstaff proper was historically a common weapon in England, where it features in the Robin Hood legend as the favorite weapon of Little John. There are also many tools that can easily be used as or quickly converted to a staff.


http://alliancemartialarts.com/quarterstaff.htm
http://ejmas.com/jwma/articles/2001/jwmaart_docherty_0501.htm
http://www.quarterstaff.org/
http://www.members.aol.com/dargolyt/TheForge/1-4staff.htm