Slave trade impacted America by starting a major war within its borders. America also got affected economically because the prices for different slaves varied on how useful and how quick that slave is therefore making America prosper in the economy.
A lay brother who escaped from the French invasion warned missionaries in a near by mission about a possible invasion. They overreacted and thought they needed to replace the missions they could lose and sent Marques de Aguayo to create Los Adaes and La Bahia.