How one platoon becomes a brigade in historical memory

Did the British regular troops sent to Montevideo fight Argentine forces?

They appear to have seen some action within the combined force, although accounts can exaggerate the scale of their contribution.

British regular troops appear to have seen some fighting as part of a combined force at Montevideo. The opposing forces also complicate national labels: Oribe's army is described as largely Argentine, while Rivera relies heavily on foreign troops and freed slaves. The 73rd Foot's distinctiveness as a regular unit can make its contribution seem larger in an account. One description gives the impression of a brigade, while the contribution is identified here as a platoon from the light company sent for skirmishing. The difference matters when judging how much of an operation a named regiment actually performed.