[Suhiir]

Also since the use of thermal sights has become fairly common many nations have developed (or are developing) new ammo for smoke discharges, similar to the way flares are used by aircraft to defeat heat-seaking missiles.

"High Performance Smoke/Obscurant Munitions

Red Phosphorus

Two types of expendable smoke/obscurant munitions that are widely available are those based on red phosphorus (RP), and brass flake. The use of zinc/hexachloroethane (HC, or HCE) based smokes was discontinued in Australia more than five years ago as a result of their potential to cause acute and chronic injury to Army personnel. White phosphorus (WP) munitions can also be used to produce copious smoke, however unlike RP, WP is highly toxic as a solid, and it spontaneously combusts in air. RP smoke compositions are by comparison pyrotechnics as the RP is mixed with oxidants and binders and therefore the burning rate can be varied."