An 1884 painting displayed in the regimental museum of the pipe band of 1st Battalion, Argyll and Sutherland Highlanders shows the unit in service dress, crossing the veldt in Zululand, wearing khaki slouch hats.
The headwear saw primary use by 15 battalions of Austrian Jägers (skirmishers) and it featured an upturned brim, leather chinstrap and feather plume.
The regular infantry also saw limited use of the Corsican hat from years 1803––36.
It became associated with the Australian military around the end of the 19th Century and since World War I it has been manufactured in Australia for the Australian Army by companies such as Akubra, Mountcastle The slouch hat or Terai hat is also associated with the Koninklijk Nederlands Indisch Leger (Dutch East Indies Army), and Gurkha regiments of the British Army and Indian Army (formerly the British Indian Army) and although it is still worn by the Gurkhas, the hat is no longer worn on active service.
The 2nd Gurkha Rifles became the first Gurkha regiment to adopt the slouch hat when they were issued with the Australian variant in 1901.
On 22 December 1890, the military commanders of the then separate Australian Colonies prior to the Federation of Australia met to discuss the introduction of the khaki uniform throughout Australia.
They agreed that all Australian Forces with the exception of the Artillery would wear the slouch hat.During the American Civil War (1861–65) the headgear was common among both Confederate and Union troops in the Western Theater, although not always with its brim turned up at the side.During the Spanish–American War, as commander of the Rough Riders, Colonel Theodore Roosevelt became known for wearing a slouch hat.This is also in tie with the New Zealand Mounted Rifles albeit with the New Zealand military insignia worn on the front of the puggaree of that era.In the United States it was also called the Kossuth hat, after Lajos Kossuth.The Gurkha terai hat is created by fusing two hats into one to make the hat more rigid and is worn at an angle, tilted to the right.