178 1 The War of Independence is over.

1787 federal constitution

The United States declared war on Germany (World War I)

192 1 Washington conference

1928 non-war convention

American economic crisis +0929

1933 Roosevelt's new deal

194 1 The Atlantic Charter was signed and the Pacific War broke out (World War II).

1942 signed the United nations declaration on the battle of midway.

1943 cairo conference Tehran conference

1945 Yalta conference