 Complete the following phrase:  Although the Spanish had established colonies in the Caribbean starting in 1493, it was not until the second decade of the sixteenth century that they began exploring the coast of Mexico. The Spanish first learned of Mexico during the Juan de Grijalva expedition of 1518. The natives kept repeating: Colua, Colua, and Mexico, Mexico, but we explorers did not know what Colua or Mexico meant, until encountering Montezumas governor at the mouth of the Rio de las Banderas. The 