Can someone describe the relationship between Japan and the United States in the late 1930s and early 1940s.

http://en.wikipedia.org/wiki/Japan_%E2%80%93_United_States_relations

Thank You:)

You're welcome.

Could you give me a link on:

Why the United States was so concerned about Japanese expansion into Southeast Asia?

The relationship between Japan and the United States in the late 1930s and early 1940s was largely characterized by escalating tensions and ultimately led to their involvement in World War II. To understand this relationship, let's break it down into a few key aspects and events:

1. Expansionist Policies: In the 1930s, Japan adopted aggressive expansionist policies, aspiring to create an empire in East Asia. Discontent with perceived Western dominance, Japan sought to conquer territories in China, Southeast Asia, and the Pacific.

2. Japanese Invasion of China: Japan's invasion of China in 1937, known as the Second Sino-Japanese War, was a significant factor in straining Japan's relations with the United States. The U.S. opposed Japan's invasion and supported China with economic and material aid.

3. U.S. Response: The United States, under President Franklin D. Roosevelt, responded to Japan's aggressive actions by implementing economic sanctions against Japan, including restrictions on oil exports, which were crucial for Japan's war efforts.

4. Pearl Harbor Attack: On December 7, 1941, Japan launched a surprise attack on the U.S. naval base at Pearl Harbor in Hawaii. This attack, resulting in the loss of American lives and significant naval damage, prompted the United States to officially enter World War II.

Overall, during the late 1930s and early 1940s, Japan's aggressive expansionist policies and their invasion of China strained its relationship with the United States. The United States responded with economic sanctions, which further escalated tensions. The Pearl Harbor attack ultimately led to the United States' direct involvement in the war against Japan.