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Answer:
Some were generous/helpful, but mostly then were condescending and judgemental because they thought they were helping them by assimilating them.
Explanation:
The World War II played a role int he decolonization of Southeast Asia when Japan took Southeast Asian lands from Europe in the World War II. Japan made this move in order to show to the Europeans that they, Europeans were not invincible.
The idea of manifest destiny greatly helped shape the U.S. governments's policies of land acquisition, since this held that the US was "destined" to expand from the Atlantic Ocean to the Pacific--meaning that the US embarked on a series of wars with Mexico and confrontations with Natives that helped the settlers move west.