This is one of the many small actions fought between bedouins and the foreign legion during the french conquest of the Sahara. The key to controlling the desert was the oasis villages. It was vital that an
attack suceeded quickly, because a force which was unsucessful would be very low on water and may not make it back to the next supply point.
(The french are Essex figures, the arabs are from Minifigs. The supply train is a mix of Essex and Irregular minitures.)