What century was Europe's large-scale colonization?

As early as in ancient Rome, colonial behavior was very popular.

In the Middle Ages, after the Crusade, the Crusaders once established a systematic Crusader Kingdom in the Middle East. These countries were strictly colonies.

The global colonization centered on Europe was carried out simultaneously in the era of firearms, the era of great navigation and the era of capitalism. It can be said that these factors interacted and influenced each other, forming the world colonial system at the end of 19 and the beginning of the 20th century. After the two world wars, the power of imperialist countries was greatly weakened and the world colonial system disintegrated.