This is true because Christopher Columbus had to make four trips across the Atlantic Ocean from Spain. These trips took place in 1492, 1493, 1498 and 1502. he hoped to find a direct water route west from Europe to Asia, he never did. Instead he found the Americas where millions of people had already lived. Columbus finding the Americas was the start of many centuries of exploration and colonization of North and South America.
Well, as time passes, if they force invaded countries to pay tribute, they will get lots of money. Also, if they last more time, they get more power and respect, soldiers will be proud of being part of that empire and they will be more united. Not completely united because there will be some betrayers that will try to cause trouble and rebellions.
Aristocrats rule that governent if no other political party is in that area