Question

which of the following occurred once the united states expanded across north america?

it entered a war with the russian empire.
it looked for new colonies in the pacific.
it closed its borders to trade and migration.
it ordered european nations out of the americas.

Explanation:

Analyze the historical context

Using the U.S. Territorial Expansion knowledge point
By the late 19th century, the United States had completed its westward expansion across the North American continent, reaching the Pacific Ocean. This completion of the domestic frontier led American policymakers and business leaders to look beyond North America to secure new markets, resources, and strategic military bases.

Evaluate the options

• War with the Russian Empire: The US did not enter a war with Russia; instead, it purchased Alaska from Russia in 1867.
• New colonies in the Pacific: With the continental frontier closed, the US turned toward overseas expansion, acquiring territories like Hawaii, Guam, Samoa, and the Philippines in the late 1800s.
• Closed borders to trade: The US actively sought to expand global trade, notably through the Open Door Policy in China.
• Ordered European nations out: The Monroe Doctrine (1823) had already declared this much earlier, before continental expansion was fully completed.

Formulate the final conclusion

The completion of continental expansion directly catalyzed the era of American imperialism, leading the nation to seek new territories and influence in the Pacific and Caribbean.

Answer:

• (A) It entered a war with the Russian Empire.
• (B) It looked for new colonies in the Pacific. (Correct answer)
• (C) It closed its borders to trade and migration.
• (D) It ordered European nations out of the Americas.