Let us not forget the
Leal Legião Lusitana, Britain's 'Foreign Legion'.
The Loyal Lusitanian Legion (LLL) was a foreign volunteer corps of the British Army, organized with Portuguese émigrés in England, that fought in the Peninsular War. The LLL was created by the initiative of Portuguese Army Colonels José Maria Moura and Carlos Frederico Lecor – exiled in England after the occupation of Portugal by the Napoleonic Army – and the Portuguese Ambassador in London Chevalier de Sousa, with the support of the British government.
As a light infantry unit, the Loyal Lusitanian Legion received green uniforms similar to those of the British rifles regiments. Furthermore, green was the livery colour of the Portuguese Royal House of Braganza, to whom the Legion remained loyal. The Legião was disbanded as a British unit in 1811, and transferred back to the reorganized and highly competent Royal Portuguese Army that helped Wellington kick the French out of Portugal and Spain. See also the 'Battle of Buçaco ', one of the pivotal battles of the peninsular war where they supported Wellington as he retreated behind the famous 'Lines of Torres Vedras' where The French were ultimately defeated and forced out of Portugal and then Spain.
Nappy's Portuguese Legion was, of course, the enemy of the Brits and the legitimate Portuguese Govt., conscripted from the remnants of the defeated Portuguese Army. I don't suppose they cared much for sunny Moscow.
Lusitania (named after the Roman province in Western Europe, corresponding to modern Portugal) was also the name of a ship whose sinking by the Germans helped convince the USA to enter the 1st World War on the UK side. Worth mentioning again, England (UK) and Portugal have been allies continuously, without a break, since 1373; the world's oldest ongoing alliance.
Ref: Wikipedia, Buçaco (Bussaco) Military Museum