Upon learning of the prevalence of South Andean POPs in northern Chile, I immediately move my forces into the border regions, preparing to attack sometime in the mid-1850s (once my badboy has gone down a little)
Shortly thereafter, medicine is developed by Bolivian researchers, who are ordered to turn their attention to developing newfangled railroades, like the ones in Brazil or the United Kingdom.
By early 1851, everything is in place. The men are ready on Chile's border, the country itself is distracted, and the time for war has come. (But such a nasty prestige hit!)
Shortly thereafter, as my forces fight their way through the Atacama desert, my recently promoted capitalists begin to build the first factory in Bolivia (of course, I would rather them build railroads and other kinds of factories, but ah well)
As the Conservatives are reelected, my forces begin to engage the last remnants of Chile's army in a tiny coastal pocket just west of Santiago. Reducing this pocket will destroy the Chilean army and give my army free reign.
After three months of bitter fighting in the high mountains on Chile's Pacific coast, Chile's army is finally eliminated. My cavalry immediately proceeds south to capture (most of) the remainder of Chilean territory.
While all this has been going on, Peruvians have been revolting in the north. I order one corps of cavalry and my infantry to go there and suppress the rebellions, while my scientists develop Interchangeable Parts.
By May 1853, Chile has been utterly crushed. A harsh peace deal is signed where Chile surrenders most of its northern territories to Bolivian control and is publically humiliated.
As a result of all of the MIL enhancing events that keep firing for Bolivia, my POPs have gone wild. Almost half the eligible voters are reactionary!
The territories taken from Chile have increased my population by about 6-700,000 people, almost all national. The added income from the valuable Chilean provinces (one of them has a precious metal RGO) has given me a good surplus to invest in further development.
By March 1855, significant signs of development have taken place. A small but growing network of railroads is beginning to bind the country together. While less extensive than the rail networks in certain neighboring provinces, especially Brazil, it is more technologically advanced than many of those neighbor state's networks.
Similarly, the appearance of imports and the growing budgetary surplus indicate the increasing industrialization of Bolivia, while population statistics show that South Andean POPs are now the largest single set, with nearly 50% of all POPs in the country being South Andean.