I want to know the answer to the following question:
Who was forced to surrender to troops formed by forces of the Banda Oriental?
All the background I'm provided with is that "After this conflict, the governor of Montevideo Francisco Javier de Elío opposed the new viceroy Santiago de Liniers, and created a government Junta when the Peninsular War started in Spain, in defiance of Liniers.". Is that enough to answer the question?
Answer: no