End of French and indian war
When Spanish conquistadors combined with native Tlaxcalan warriors led by Hernan Cortes and Xicotencatl the Younger attacked the Aztec capital Tenochtitlan in 1521, they captured the city, as well as emperor Cuauhtemoc.
You can say the three G's: Gold, God, and Glory. But also you can assume it was for the most part economic reasons. Spain was in search of gold, France colonized because the fur trade, and Great Britain wanted to participate in the competition for natural resources such as timber.
She was a feminist ordeal that emerged in the late nineteenth century and had a profound influence on feminism well into the twentyth century.