Spain found missions and presidios A. to convert American Indians to Christianity, and C. to teach American Indians how to live as Spanish colonist.
It was a way to try that the Indians become sedentarian in the frontier of the Empire. The missionaries often learnt about the Indian culture in order to teach them Christianity in a way they would understand, but it was a non-planned effect of the establishment of missions. I any case they would want the Indians to become soldiers, because they might have turned against them.
Well, Grover Cleveland was already the 22nd president, therefore, if you look at it this way, William McKinley is 24th. :) But to be technical, yeah, Grover Cleveland.<span />