An Elephant for America? (decision)
The requirement is that the date is after the 1.1.1861 (The start of the second scenario) and that USA and Siam has a relation of at least 0. It gives USA the event An Elephant for America? (Event). The event increases the relation between Siam and USA with 30.
The decision is an attempt to make elephants breed and life in America, which sadly cannot happen, as USA will refuse it.