"HOMPESCH CHASSEURS WERE CUTTING EDGE UNIT IN THE BRITISH ARMY:
When formed by Baron von Hompesch and attached to the Duke of York's army during the War of the First Coalition, Hompesch's Chasseurs were put under the command of a Polish-born emigré officer who also commanded the Baron's Hussars:Francis de Rottenburg. Rottenburg was a cutting-edge thinker on light infantry tactics, and authored the first book on the subject.
De Rottenburg was raised in what is now Gdañsk in Poland. He spent almost a decade in the French army which came to an end with the French Revolution. In December 1795, de Rottenburg joined the British army, serving in Hompesch's Hussars, a unit of foreign-born troops. In 1794 he helped to establish Hompesch's Light Infantry (Chasseurs), which later became part of the 5th Battalion of the 60th Regiment of Foot, the first rifle-armed unit of the British Army. De Rottenburg rose to the rank of lieutenant-colonel in the unit, and commanded it during the Irish Rebellion of 1798 and the capture of Suriname in 1799…" :
https://flintlockandtomahawk.blogspot.com/2015/08/hompesch-chasseurs.html

Hompesch's Regiment of Mounted Riflemen:
https://en.wikipedia.org/wiki/Hompesch%27s_Regiment_of_Mounted_Riflemen

British; Émigré and Foreign Troops,Corsican Rangers, Watteville's Regt, Roll's Regt and Hompesch's Mounted Rifles, Egypt, 1801:
https://i.pinimg.com/originals/01/b9/dd/01b9dd7974c48c1422a5282349d15254.jpg
https://i.pinimg.com/originals/38/5b/26/385b26e1acb4cdefe80ac03e727ae485.jpg

5th Battn. 60th Regt. : http://5th60thrifles.co.uk/?page_id=259