French military forces had committed 10,800 troops, together with yet more reinforcements, totalling nearly 16,000 men, to the defense of a monsoon-affected valley surrounded by heavily-wooded hills and high ground that had not been secured. Artillery as well as ten US M24 Chaffee light tanks (each broken down into 180 individual parts, flown into the base, and then re-assembled) and numerous aircraft (attack and supply types) were committed to the garrison. A number of quadruple 0.50 calibre machine guns were present and used in the ground role. This included France's regular troops (notably elite paratrooper units, plus those of the artillery), French Foreign Legionnaires, Algerian and Moroccan tirailleurs (colonial troops from North Africa) and locally-recruited Indochinese (Laotian, Vietnamese and Cambodian) infantry.