Celia Cruz? Then a. move to the U.S.
It was caused by American demands that Spain resolve peacefully to Cube, which Spain was unable to do.
If you were to break down Churchill's famous quote, you would see this:
Riddle, Mystery, Enigma. These three words are key. They are all connected. What is the connection --- these words describe a secretive and mysterious meaning. The best way to understand a puzzling quote like this is to break it down, and define each and every word; Forming a more understandable explanation.
Answer:
Its primary purpose was to unite the Puritan colonies in support of the church, and for defense against the American Indians and the Dutch colony of New Netherland.
Irrigation of crops led to salinization of the soil, Sumer was located on a flat plain that provided no natural barriers to invasion, and the land became too swampy to grow adequate crops.