AHC: Keep the Federal Republic of Central America together

With a POD between 1822 and 1840, it must make Central America remain a country and not separate.

How would you do that?
 
Quiet hard. Firstly there should construct better transportation network. And then create some common nationalism so people feel being Central American not Nicaraguan, Guatemalan, Costa Rican etc. Speciality whole political spectrum has get to feel that FRCA is worth of preserving.
 
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