The Japanese conquest of Manchuria in 1931 was only the first step in what became a much larger campaign to create a pro-Japanese "buffer state" in North China. This lesson will examine the overall principles which underlay both Japanese and American foreign policy in the mid- to late-1930s.

American foreign policy debate over U.S. entry into the League of Nations-collective security versus national sovereignty, idealism versus pragmatism, the responsibilities of powerful nations, the use of force to accomplish idealistic goals, the idea of America. Understanding the debate over the League and the consequences of its failure provides insight into international affairs in the years since Great War. In this lesson, students read the words and listen to the voices of some central participants in the debate over the League of Nations.

On April 11, 1898, two months after the battleship U.S.S. Maine was destroyed by an explosion in Havana harbor, President McKinley sent a message to Congress requesting authority to use the U.S. armed forces to end a brutal civil war in the Spanish colony of Cuba. This lesson plan, through the use of primary sources and a WebQuest Interactive, will focus on the causes of the war and the political debate in the United States over the advisability of intervening militarily in the affairs of countries.

The unwillingness of the Soviet Union to allow the creation of independent and democratic states in Eastern Europe, and the failure of East and West to reach a compromise on Germany, left many Americans puzzled. Why were the Soviets acting as they did? Moreover, how should the United States respond? This lesson will consider containment through the use of original documents, mostly from the Truman Presidential Library. They will study what it meant in theory, and then examine the first two major instances of its application"”the Truman Doctrine and the Marshall Plan.

This lesson examines the ways in which France challenged American sovereignty between 1796 and 1801.

What is the most compelling evidence explaining why the U.S. entered World War I? After completing the lessons in this unit, students will be able to: Take a stand on a hypothesis for U.S. entry into World War I, supported by specific evidence.

This lesson examines the ways in which Great Britain and France countries challenged American neutrality during the Thomas Jefferson administration.

For the Japanese leadership, events in Europe during the first half of 1940 offered new opportunities for resolving the war in China. In this lesson students will examine primary documents and maps to discover why Japan embarked on its "southern advance."

American foreign resonates with the debate over U.S. entry into the League of Nations-collective security versus national sovereignty, idealism versus pragmatism, the responsibilities of powerful nations, the use of force to accomplish idealistic goals, the idea of America. Understanding the debate over the League and the consequences of its failure provides insight into international affairs in the years since the Great War and beyond. In this lesson, students read the words and listen to the voices of some central participants in the debate over the League of Nations.

In the spring of 1948 Stalin provoked the first serious international crisis of the Cold War by announcing a blockade of West Berlin. This lesson will trace the Berlin blockade and airlift of 1948"“49 and the establishment of NATO.

The treaty of peace ending the Spanish-American War resulted in the United States obtaining the Philippine Islands from Spain. Despite intense political opposition to the acquisition of the islands, the U.S. Senate ratified the treaty. The political impact of anti-imperialist arguments, the difficult experience of suppressing native Filipino resistance, and the lack of attractive opportunities for further territorial expansion, all effectively stalled the American imperialist/expansionist movement.

To what events in United States and European foreign affairs does the Monroe Doctrine refer? What was the primary purpose behind the Monroe Doctrine?

The outbreak of war in Europe in September 1939 posed a serious challenge to U.S. neutrality. On the one hand, Americans' sympathies lay overwhelmingly with Great Britain and its allies; on the other hand, public sentiment overwhelmingly favored staying out of the war. Through a study of contemporary documents, students learn about the difficult choices faced by the Roosevelt administration during the first fifteen months of World War II, culminating in the decision to provide direct military aid to Great Britain.

In this lesson of the curriculum unit, students reconsider the events leading to U.S. entry into World War I through the lens of archival documents.

By the beginning of 1944, victory in Europe was all but assured. The task of diplomacy largely involved efforts to define the structure of the postwar world. Why and how did the United States attempt to preserve the Grand Alliance as American diplomats addressed European issues?

Although the campaign in the Mediterranean was successful in forcing Italy out of the war, Allied military planners by late 1943 had concluded that it would not be enough to defeat Nazi Germany. This lesson plan will focus on the overall strategy pursued by the Allies in the final months of World War II in Europe.

This lesson shows students how broadly the Lend-Lease Act of March 1941 empowered the federal government"”particularly the President"”and asks students to investigate how FDR promoted the program in speeches and then in photographs.

In January 1918, less than one year after the United States entered World War I, President Woodrow Wilson announced his Fourteen Points to try to ensure permanent peace and to make the world safe for democracy.

In 1899 and 1900, Secretary of State John Hay issued what became known as the Open Door Notes to foreign powers involved in China. Secretary Hay called on those powers to respect the rights of each other, to agree to an open market and equal trading opportunities for merchants of all nationalities, and to respect the territorial and administrative integrity of China.

Faced with crippling economic sanctions imposed by the United States, the Japanese government decided in September 1941 to prepare for war to seize the raw materials that they were now unable to obtain from America. Students in this lesson will put themselves in the shoes of U.S. and Japanese diplomats in the final months of 1941.