Green beret
When visiting the Special Forces at Fort Bragg on 12 October 1961, President John F. Kennedy asked Brigadier General William P. Yarborough to make sure that the men under his command wore green berets for the visit. Later that day, Kennedy sent a memorandum which included the line: "I am sure that the green beret will be a mark of distinction in the trying times ahead". By America's entry into the Vietnam War, the green beret had become a symbol of excellence throughout the US Army. On April 11, 1962 in a White House memorandum to the United States Army, President Kennedy reiterated his view: "The green beret is a symbol of excellence, a badge of courage, a mark of distinction in the fight for freedom". To no avail, both Yarborough and Edson Raff had previously petitioned the Pentagon to allow wearing of the green beret. The President, however, did not fail them.
Military beret
Icelandic armed services commonly use berets.
The beret is the standard headgear for the Indian Army. Berets are worn by officers and other ranks, apart from Sikhs, who wear turbans. The beret colours worn by the Indian Army are as follows:The beret is the standard headgear of armed forces and police personnel in Indonesia. It is also worn by paramilitary and other uniformed services in the country such as the Fire Brigade, Search and Rescue, Scouts, civil militias (such as "Banser") and civil paramilitary organizations. In the Military Services (Army, Navy and Air Force), the berets are dragged to the right (the insignia are worn on the left side), while in the Indonesian National Police force and Military Police Corps, the berets are dragged to the left (the insignia are worn on the right side). Both having its own meaning, dragged to the right meaning "ready for combat and defense" and dragged to the left meaning "ready for law enforcement and order". 
Military and Police services according to their beret colours which represent different units within the force are as shown below:The beret color system used for the different branches of the Iraqi military and security forces changed after the fall of Saddam Hussein.
Beret colors currently (and formerly) worn by Iraqi forces are as follows: