White phosphorus munition

Some tools make thick smoke.

This smoke can hide things. It also makes bright light.

This stuff catches fire when it touches air. It burns very hot. It can start fires on cloth or fuel.

Soldiers use it to make smoke screens. This helps them move safely.

It can also mark a spot in the sky. This tells others where to look. It is a very powerful tool.

White phosphorus is a chemical element. It is used in many weapons. These weapons are called munitions.

White phosphorus is pyrophoric. This means it catches fire when it touches air. It burns very fiercely. It can start fires on cloth or fuel. This makes it useful for incendiary weapons. These are tools meant to start fires.

It is also great at making smoke. When it reacts with air, it makes a thick cloud. This cloud is made of phosphorus pentoxide vapour.

Soldiers use these smoke screens to hide. They can mask their movement or their shooting spots. They also use it to mark a target. This tells others where to look.

Many groups have used it in wars. During World War II, American tanks used it. The smoke could blind enemy tanks. This helped the tanks get closer. In Vietnam, it was used to destroy tunnels. The fire would use up all the oxygen inside.

Today, it is still used in many places. Some people say it should not be used near people. They worry about the burns it causes.

White phosphorus is a special chemical element used in many types of weapons. These weapons are called munitions. Some people call them WP, or use the slang terms "Willie Pete" and "Willie Peter."

This name comes from the World War II way of saying the letters WP. These munitions can be used to make smoke or light. They can also be used as incendiary weapons to start fires. This makes them very versatile tools on a battlefield.

White phosphorus works in a very specific way because it is pyrophoric. This means it catches fire just by touching the air. When it hits the air, it burns very fiercely. It can easily ignite things like cloth, fuel, or ammunition.

It is also a great way to make smoke. When it reacts with air, it creates a thick blanket of phosphorus pentoxide vapour. This smoke can hide the movement of friendly forces or their shooting spots.

People have used versions of this substance for a long time. In the 19th century, Irish nationalist arsonists used a mix called "Fenian fire." This was a solution of phosphorus and carbon disulfide. When the liquid evaporated, the phosphorus would burst into flames.

Later, the British Army made the first factory-built white phosphorus grenades in 1916. During the First World War, many different armies used them for smoke or other roles.

History shows many specific uses for these munitions. During World War II, American Sherman tanks used 75mm white phosphorus rounds. These rounds could blind enemy tanks with smoke. This helped the Sherman tanks get close enough to use their own weapons.

In the 1944 liberation of Cherbourg, one US mortar battalion fired 11,899 white phosphorus rounds. In the Vietnam War, the US used these grenades to destroy tunnel complexes. The fire would use up the oxygen inside the tunnels.

Today, the use of white phosphorus is a very serious topic. It has been used by many forces in recent conflicts, such as in Iraq, Lebanon, and Gaza.

Some people worry about using it near people because it causes severe burns. In the Second Battle of Fallujah, reporters saw how the substance could melt skin. Human rights groups often investigate if its use follows international laws. It remains a powerful tool that can be both helpful for marking paths and very dangerous to living things.

White phosphorus munitions are weapons that utilize a specific allotrope of the chemical element phosphorus. These weapons are highly versatile and are used for three primary purposes: creating smoke, providing illumination, and acting as incendiary tools. In military circles, they are often referred to as WP. They are also known by the slang terms "Willie Pete" or "Willie Peter." These nicknames come from the phonetic alphabet used during World War II to say the letters W and P.

The core mechanism of white phosphorus relies on a property called pyrophoricity. This means the substance is ignited immediately upon contact with the air. When the phosphorus reacts with oxygen, it burns very fiercely. This intense reaction can ignite various combustibles, such as cloth, fuel, or ammunition. Furthermore, the chemical reaction produces a thick, immediate blanket of phosphorus pentoxide vapour. This vapour acts as a highly efficient smoke-producing agent.

Because of these properties, white phosphorus is used in several distinct ways on the battlefield. As a smoke agent, it creates screens to mask the movement of friendly forces. It can also hide infrared signatures and specific shooting positions from an enemy. In its role as a marker, it is used in smoke/marker rounds to designate points of interest. For example, a light mortar might use these rounds to help artillery spotters find a target. Finally, as an incendiary, it is used to start fires or clear out structures.

The history of these substances stretches back to the 19th century. During that time, Irish nationalist arsonists used a formulation known as "Fenian fire." This was a solution of phosphorus in carbon disulfide. Once the carbon disulfide evaporated, the phosphorus would burst into flames. The British Army later introduced the first factory-built white phosphorus grenades in late 1916. During the First World War, American, Commonwealth, and Japanese forces used them extensively.

During World War II, the use of white phosphorus became much more widespread. In 1940, the British used improvised "Special Incendiary Phosphorus" grenades to defend against a potential German invasion. American forces also relied heavily on these munitions during the Normandy campaign. At that time, 20% of American 81 mm mortar ammunition consisted of M57 smoke rounds using WP filler. In the 1944 liberation of Cherbourg, a single US mortar battalion, the 87th, fired 11,899 white phosphorus rounds.

Specific tactical examples show how these munitions function in combat. US Sherman tanks used M64, 75mm white phosphorus rounds to screen their movements. Tank crews also used the smoke to blind German tanks. This allowed the Shermans to get close enough to use their armor-piercing rounds effectively. In the Vietnam War, US forces used white phosphorus grenades to destroy Viet Cong tunnel complexes. The burning phosphorus would consume all the oxygen inside, suffocating those sheltering within.

In more recent decades, the use of white phosphorus has led to significant international debate. During the Second Battle of Fallujah in 2004, reporters observed the substance creating screens of fire. They reported that the substance could cause severe burns and melt skin. This led to investigations by the Iraqi government and debates over whether the substance should be classified as a chemical weapon. While US General Peter Pace stated it is an incendiary and not a chemical weapon, some experts disagree.

Similar controversies have occurred during conflicts in Lebanon and Gaza. In the 2006 Lebanon War, Israel stated it used phosphorus shells against military targets in open ground. However, Lebanese officials claimed the shells were used against civilians. During the 2008–2009 Gaza War, human rights groups reported the use of WP shells in populated areas. These reports included instances of patients being treated for phosphorus burns in hospitals.

The use of these munitions remains a complex issue involving international humanitarian law and military necessity.