He asked the King and Queen for, the title Admiral of the Sea and 20% of the profits (of the gold and treasures). Columbus promised to make Spain rich with the gold he would "find" in the Caribbean. (He never found any gold and he was a fraud and just wanted money and glory, he was brave though.) But he did bring back slaves, (The Natives). Tip: explorers' motives to explore back in that day were the Triple G's: God, (To spread the word of god to others) Gold, & Glory