White Phosphorus (WP)
White Phosphorus (WP), known as Willy Pete, is used for signaling,
screening, and incendiary purposes. White Phosphorus can be used to
destroy the enemy's equipment or to limit his vision. It is used
against vehicles, petroleum, oils and lubricants (POL) and
ammunition storage areas, and enemy observers. WP can be used as an
aid in target location and navigation. It is usually dispersed by
explosive munitions. It can be fired with fuze time to obtain an
airburst. White phosphorus was used most often during World War II
in military formulations for smoke screens, marker shells,
incendiaries, hand grenades, smoke markers, colored flares, and
tracer bullets.
The Battle of Fallujah was conducted from 8 to 20 November 2004
with the last fire mission on 17 November. The battle was fought by
an Army, Marine and Iraqi force of about 15,000 under the I Marine
Expeditionary Force (IMEF). US forces found WP to be useful in the
Battle of Fallujah. "WP proved to be an effective and versatile
munition. We used it for screening missions at two breeches and,
later in the fight, as a potent psychological weapon against the
insurgents in trench lines and spider holes when we could not get
effects on them with HE. We fired shake and bake missions at the
insurgents, using WP to flush them out and HE to take them out. ...
We used improved WP for screening missions when HC smoke would have
been more effective and saved our WP for lethal missions."
White phosphorus is not banned by any treaty to which the United
States is a signatory. Smokes and obscurants comprise a category of
materials that are not used militarily as direct chemical agents.
The United States retains its ability to employ incendiaries to
hold high-priority military targets at risk in a manner consistent
with the principle of proportionality that governs the use of all
weapons under existing law. The use of white phosphorus or fuel air
explosives are not prohibited or restricted by Protocol II of the
Certain Conventional Weapons Convention (CCWC), the Convention on
Prohibitions or Restrictions on the Use of Certain Conventional
Weapons which may be Deemed to be Excessively Injurious or to have
Indiscriminate Effects.