There are many weapons which root from very ancient times. Cudgel is one of them. Baton (a.k.a. truncheon and nightstick) is a similar one. Specifically, cudgel has got more military war flair with it.

Search for "cudgel" on:

http://www.ehow.com/list_7320442_weapons-used-egyptian-wars.html

and

http://www.hinduwisdom.info/War_in_Ancient_India.htm

and

http://rtw.heavengames.com/history/civs/ancient_africa/armiesancientafrica/ .

And then see the images at http://www.google.ca/search?q=cudgel&hl=en&safe=off&prmd=imvns&source=lnms&tbm=isch&ei=8M1JT-CSDcHu0gH_u-SuDg&sa=X&oi=mode_link&ct=mode&cd=2&ved=0CA8Q_AUoAQ&biw=1280&bih=675&qscrl=1 .

Here goes a pic in which there are batons hidden in the back:

(From http://goo.gl/bZxKb)