Red Horse
Give any POD that would have the United Provinces of Rio de la Plata intact and stable.
How would La Plata survive?we just went through this last week.
United Provinces was basically a working title (they declared for independence, but virtually nothing was defined), and many simply substitute the name Argentina. All they lost was Uruguay, and that was because the portenos urged Luso-Brazil to take Artigas off their hands. Beyond that, they went through a bunch of pseudo civil wars (more like various power factions struggling to take control and define what the country was to be) until they finally stabilized as Argentina.