Your plan works extremely well. Bolivia invades the next morning, leading with major bombing campaigns against your border cities. The evacuations are expensive and very difficult, but result in thousands of lives being saved. Combined with the anti-aircraft systems, they seriously limit civilian casualties. The anti-aircraft systems protect key infrastructure in those cities. Your military responds effectively to the Bolivian offensive, and it is clear that the Peruvian troops, defending their country, are more motivated than the Bolivian troops under control of an unpopular dictator. Your troops force the Bolivian offensive back across the border and deep into Bolivian territory. A coalition of UN troops arrives after two days to help you defeat Bolivia. Bolivia is soundly defeated, the dictator is overthrown, and Peruvian casualties remain low. Your popularity soars at home, the UN commends your handling of the situation, and you gain influence in Bolivia as the country forms a new government, closely allied with your government. While war always involves tragedy, you have done an admirable job handling a brutal situation.