WI: The Chile-Peruvian War of 1975

I've posted before about Operación Soberanía, an offensive war that was to be launched by Argentina against Chile in 1978 over the disputed Beagle channel. War was averted only six hours before combat operations were due to begin thanks to a sudden storm.

However, the disputes with Argentina were far from Chile's only worries. To the north lay Peru, under the control of leftist military dictator Juan Velasco Alvarado. Backed by Cuba and the USSR, Velasco built the Peruvian military into a formidable force with Warsaw Pact weaponry. He evidently made plans for a massive invasion of Northern Chile in order to reconquer land that Peru had lost to Chile in the War of the Pacific in the 1880s, though it is disputed as to how seriously he actually considered acting on such plans.

Chile, meanwhile, was under the control of US-aligned dictator Augusto Pinochet. The Chileans evidently feared a Peruvian invasion enough to twice consider launching a preemptive war to prevent any such attack.

So, what if war had erupted between Chile and Peru in early 1975? Who would have won? It seems that, considering how militarized the two countries had become, that both sides would have incurred major losses no matter what the outcome. Some Chilean generals (see the article above) seem to indicate that a preemptive strike on Peru might have resulted in a Peruvian victory and the destruction of the Chilean Air Force, while Pinochet himself evidently indicated in a 1999 interview that a Peruvian offensive in the mid-70s could have gotten halfway to Santiago.

I feel like such a conflict would have a greater potential to become a Cold War proxy conflict than a potential Chile-Argentina war, given that this scenario pits a US-aligned capitalist military dictatorship against a Soviet-backed leftist military dictatorship (as opposed to two US-backed military dictatorships duking it out).

Might the US intervene in some fashion if the Peruvians look too close to winning, or does the ongoing collapse of South Vietnam across the Pacific preclude that? How does Cuba respond? Does it forgo the massive deployments to Africa of the OTL 1970s and 1980s in favor of aiding the Peruvians in taking down Chile?
 
The US is bound to intervene somehow I reckon. Maybe encourage another ally to attack Peru and take some pressure off Chile? Maybe just give the Chileans cheap loans and plentiful weapons exports?

Or just land the marines.

As to what Cuba and the Soviets do, I think much depends on if the Chileans attack, or if the Peruvians start the fight. If the Peruvians are defending themselves, we may need Soviet arms subsidies and subsidies for a Cuban intervention.

I wonder if Argentina might get involved? Especially if Chile is the aggressor, they might figure it is a good time to turn the screws on Chile to resolve things in Patagonia. That may lead to a more Argentine-favoured boarder, or it might lead to war.

fasquardon
 
Isn't Northern Chile mostly the Atacama desert?


The key word here is "mostly." There is a coastal strip that provides both a home to most of the cities and towns of the area and the only north-south land transportation corridor on the west side of the Andes. Thus, the greater the progress of Peruvian forces into Chilean territory, the greater the vulnerability of their life-line to both naval gunfire and amphibious raids. To put things another way, in order to conduct an overland invasion of Chile, the Peruvians would have had to have found some way to neutralize the Chilean Navy.
 
The key word here is "mostly." There is a coastal strip that provides both a home to most of the cities and towns of the area and the only north-south land transportation corridor on the west side of the Andes. Thus, the greater the progress of Peruvian forces into Chilean territory, the greater the vulnerability of their life-line to both naval gunfire and amphibious raids. To put things another way, in order to conduct an overland invasion of Chile, the Peruvians would have had to have found some way to neutralize the Chilean Navy.

How wide is the coastal strip roughly? If it's fairly thin then seems like the Chilean defenders have a real advantage since they can concentrate their forces in a small area and focus on defense in depth over any particular defensive line.

I wonder what forms US support for Chile might take.
 

destiple

Banned
To the north lay Peru, under the control of leftist military dictator Juan Velasco Alvarado. Backed by Cuba and the USSR, Velasco built the Peruvian military into a formidable force with Warsaw Pact weaponry. He evidently made plans for a massive invasion of Northern Chile in order to reconquer land that Peru had lost to Chile in the War of the Pacific in the 1880s
What kind of buildup are we talking about ? how many aircraft tanks and naval vessels
 
Bolivia would get involved but at there first setback the revolving doors of government would start up again and they would be out of it while they dealt with the next series of coupes. Argentina is much more of a toss up, it would really depend on their domestic situation when the war kicked off. Its possible they would hit Bolivia seeking an easy victory and to 'cut the flow of weapons to the Marxist gurillas'.
The joker in the deck would be the Ecuadorian reaction they had a bone to pick with the Peruvian government and if enough of the Peruvian army is bogged down in Chile they might just have the movie to try and resolve some unfinished business.
 
The width of the coastal strip varies widely. There are places (such as the stretch of the PanAmerican highway on both sides of the city of Arica) where the transportation corridor runs within ten kilometers of the coast. (This would make it vulnerable to shelling from the 6-inch guns of the Chilean cruisers of the day. In other places, it highway/railroad corridor is further inland, which means that the Chilean Marines would have to do a bit of walking.)

As far as US aid goes, I suspect that it would be minimal. While elements in the Executive Branch, such as the Secretary of State Henry Kissinger and the Central Intelligence Agency, were sympathetic to the new Chilean government, sentiment within the US Congress was solidly anti-interventionist. (In 1974, the previous Congress had greatly reduced aid to the Republic of Vietnam. In the 1976 of our time line, the same Congress that would have been in session in 1975 placed an arms embargo upon Chile.)
 
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The joker in the deck would be the Ecuadorian reaction they had a bone to pick with the Peruvian government and if enough of the Peruvian army is bogged down in Chile they might just have the movie to try and resolve some unfinished business.

There are many jokers in this deck. Indeed, it may well be that the great engine of peace in South America is the vulnerability to a third party that results from any concentration of forces against a second.
 
Would Argentina and Bolivia jump into the war?
The Argentine Navy would be itching at the opportunity to take on Chile while they are distracted. Unlike 1978, though, the left wing guerrillas weren't yet defeated and there was still a weak constitutional government lead (officially and only some months) by Isabel Peron, so they Navy can't make a move in 1975 without the approval of the Argentine Congress. I don't think the Argentine population or the Congress would want to see Isabel Peron as a wartime commander in chief. I think the political tensions would be between the struggle with the left wing guerrillas, forestalling/advancing a coup d'etat and the possibility of impeaching Isabel Peron and putting a wartime commander in chief in charge who could lead a (seemingly) victorious war against Chile.
 

Marc

Donor
Keep in mind that since the Second World War, an abiding international principle has been that no country shall be allowed to successfully seize significant territory from its neighbors (outright conquest and annexation is completely verboten).
It's most likely that it would be enforced by the Hegemon of the Western Hemisphere regardless of who is occupying the White House.
South American wars, therefore, in modern times, would be simply a question of how many killed and crippled per square kilometer.
Nothing really gained save some psychic Viagra for the various "winning" military and political elites.
 
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