Why did the united states choose to acquire lands once controlled by spain?

Over 100 years ago, US President William McKinley signed a “benevolent assimilation” proclamation that officially turned the Philippine Islands (which were under the control of Spain before Spanish-American war) into a territory controlled by the United States. Historians note that at that time the Philippines had tremendous strategic importance for the United States, striving for world domination.

Explanation:

60-70 % percent of Canadian population lives along the Great Lakes and St. Lawrence River.

 This is in the southern border of Canada-USA this is in such cities such as Windsor,and Quebec and their metropolitan. the northern areas of Canada are sparsely populated, accounting only for its 30 percent.