The late 19th and early 20th centuries marked a transformative period for the United States as it transitioned into an industrial powerhouse and emerged as a new imperialist force on the global stage. Here are some key points regarding US imperialism during this period:

1. Industrial Revolution and Economic Expansion:

• Between 1865 and 1895, the United States experienced rapid industrialization, leading to a surge in production capacity.
• Initially, the US focused on its vast domestic market, given the substantial population growth resulting from European migration and internal expansion. However, as industrial capacity exceeded domestic demand, the need for external markets and raw materials became evident.

2. Policy of Isolation:

• In the early stages of its development, the US followed a policy of isolationism, which reflected a general disinterest in global affairs. This was partly due to its focus on domestic consolidation and development.

3. Emergence of US Imperialism:

• By the 1890s, the United States had transitioned into an imperialist power, driven by a growing need for export markets and access to raw materials for its expanding industries.
• The idea of the "White Man’s Burden" was used to justify American intervention abroad, framing it as a duty to bring modern civilization to less developed nations.

4. Open Door Policy in China:

• In response to European attempts to partition China in the 1890s, the US asserted its interests by implementing the "Open Door Policy." This policy advocated for equal trading rights and access to Chinese markets for all imperial powers, without any exclusive spheres of influence.

5. Boxer Rebellion and US Involvement:

• The Boxer Rebellion (1899-1900) was a violent anti-foreign and anti-Christian revolt in China. The US contributed troops to help suppress the rebellion, further solidifying its presence in China.

6. Monroe Doctrine and Expansion in the Americas:

• In 1893, the United States reaffirmed its hegemony over North and South America through the Monroe Doctrine. It effectively declared its sovereignty over the entire American continent, with its directives to be treated as law.
• The US successfully pressured the British into accepting arbitration in a territorial dispute between Venezuela and British Guiana, showcasing its growing influence in the Western Hemisphere.

7. Policy of Appeasement towards Japan:

• The Russo-Japanese War of 1904-1905 provided an opportunity for the US to mediate between Russia and Japan. President Roosevelt played a key role in persuading Russia to acknowledge Japan’s territorial gains.
• The US also entered into a secret agreement with Japan, allowing American trade in the regions where Japan held influence. This policy of appeasement towards Japan inadvertently contributed to Japan's rise as a major power and a rival to the US in the Pacific.

This period of American imperialism marked a significant shift in the country's foreign policy, as it increasingly asserted its interests and influence on the global stage. The US would continue to play a prominent role in international affairs in the decades that followed.

The expansion of the Monroe Doctrine and the subsequent events you mentioned illustrate the United States' growing involvement in Latin America and its efforts to protect and advance its interests in the region during the early 20th century:

1. Corollary to the Monroe Doctrine (1904):

• The Corollary to the Monroe Doctrine, introduced by President Theodore Roosevelt in 1904, represented an extension of the Monroe Doctrine's principles.
• It asserted that the United States had the right to intervene in the internal affairs of Latin American countries to maintain law and order and protect its own interests.
• This policy justified U.S. intervention in countries where it believed political instability or economic interests were threatened.

2. Panama Canal:

• The construction of the Panama Canal was a significant infrastructure project that connected the Atlantic and Pacific Oceans. It greatly facilitated global trade and naval mobility.
• The United States played a role in the construction by initially purchasing the rights and equipment from the French company that had begun the project.
• When the Colombian government opposed the terms of the agreement regarding the canal's construction, the U.S. supported a Panamanian independence movement and recognized Panama as an independent nation in 1903.
• Panama then signed a more favorable agreement with the United States, which allowed the canal's construction to proceed.

3. Neo-Colonialism in South America:

• Following Roosevelt, Presidents William Howard Taft and Woodrow Wilson continued policies that aimed to promote U.S. economic interests in Latin America.
• This often involved fostering investments by U.S. companies and encouraging their influence in Latin American economies.
• These policies were sometimes seen as neo-colonialism, as the United States sought to exert control over the economic and political affairs of these countries.

4. U.S. Intervention in Mexico:

• In the case of Mexico, U.S. involvement was more direct. The United States supported a coup against the popularly elected Mexican leader, Francisco Madero, in 1913.
• This intervention was met with hostility from the Mexican population and led to a complex and often strained relationship between the two countries.

These actions reflected the United States' pursuit of its interests in Latin America, which included ensuring the security of the Panama Canal, promoting economic opportunities for American companies, and asserting influence in the region. However, such interventions also generated tensions and anti-American sentiments in some of these nations.