The mounted trooper and the two in brown coats are from the Portuguese Legion serving in the French army. The one in green is from I think the Loyal Lusitanian Legion, tat was formed by the British who then gave it to the Portuguese Government. The one in grey I think is a regular Portuguese line infantry.
Portuguese Caçadores 1808-15 Left, Fusilier -1808/09 Fair well uniformed and dressed Centre, Drummer-1810/15 Regimental uniforns with distinctive lace edging the colar and cuffs. Right, Fusilier, 1810/15 This is the standard dress during the campaigns with Wellington which took them from Portugal to France.
Portugal; 19th Infantry(formely Regt. Cascais), Colonel and to the rear a Soldier and Sapper. 1806