what were the most important foreign policies during the 1800's and 1900's

For which country?

Do not Know but think it is Knights

To determine the most important foreign policies during the 1800s and 1900s, one should consider several key events and developments during this period. Here are a few significant foreign policies that shaped the world during this time:

1. Manifest Destiny and Westward Expansion (1800s): The United States' policy of Manifest Destiny aimed to expand its territory from the Atlantic to the Pacific. This policy led to various annexations, including the acquisition of Louisiana, Oregon, Texas, and the Mexican Cession, significantly reshaping North America.

To understand the importance of this policy, you can delve into historical documents, such as the Louisiana Purchase, the Treaty of Guadalupe Hidalgo, and the Oregon Treaty. Additionally, studying the role of prominent figures like President James K. Polk and explorers like Lewis and Clark can provide further insights.

2. Monroe Doctrine (1823): Issued by President James Monroe, this policy stated that any further colonization efforts by European powers in the Americas would be considered as acts of aggression towards the United States. The doctrine aimed to secure the newly independent Latin American nations and protect U.S. interests in the region.

To comprehend the significance of the Monroe Doctrine, you can study the political climate of Latin America at that time, including the struggles for independence, and examine how this policy shaped U.S. involvement in the region.

3. Imperialism and Colonialism (Late 1800s - Early 1900s): During this period, several European powers embarked on a policy of imperialism, seeking to establish colonies and exploit resources around the world. The Scramble for Africa and the colonization of Asia were pivotal events during this era.

To understand the importance of imperialism and colonialism, you can examine historical events like the Berlin Conference, which divided Africa amongst European powers, and the Opium Wars in China, which led to increased European influence. Also, studying the motivations behind imperialism, such as economic interests and the search for strategic advantages, can provide valuable insights.

4. World Wars and Shifting Alliances (1914-1918 and 1939-1945): The two World Wars defined international relations during the early and mid-20th century. They involved multiple countries and led to significant geopolitical changes, including the collapse of empires and the rise of new powers.

To comprehend the importance of these conflicts, you can examine the causes, alliances, and outcomes of each war. Studying the Treaty of Versailles, the League of Nations, the rise of fascism and Nazism, as well as the formation of the United Nations, can provide insights into the foreign policies pursued during this turbulent period.

These are just a few examples of significant foreign policies during the 1800s and 1900s. Further exploration of specific regions and events, such as the Cold War, decolonization, and the formation of international organizations, can provide a more comprehensive understanding of the era's foreign policies.