The Progressive Era is considered from 1890 to 1920. The major role of the United States in global affairs during this period of time was its involvement in the war.
The military affairs of that time included the war with Spain, the war to conquer the Philippines and the entry into the First World War.
Until the beginning of the 20th. century, political affairs in the US used to follow Washington and Madison, guidelines of neutrality and nonintervention.
But in those times, European nations turned into imperialism, establishing colonies in different parts of the planet. Time passed by when Theodore Roosevelt, influenced by <em>The Influence of Sea Power Upon History</em>(written by Admiral Alfred Thayer in 1890), understood the potential of investing money in other countries, securing the interest of the U.S.
In the 1910-1920's, the United States government followed an intervention policy in the Caribbean and Central America, the Philippines and even President Wilson supported the Mexican revolution.
Answer;
The sequence of 20th Century Cold War events in the correct chronological order is;
Adoption of the Marshall Plan > Cuban Missile crisis > fall of the Berlin Wall.
Explanation;
Marshall plan was a programme of economic aid offered by the US to any European country. The plan was rejected outright by Stalin and any Eastern Bloc country considering accepting aid was reprimanded severely. Consequently the aid was given to the western European Countries.
The Cuban Missile crisis; a US spy plane was reported sighting the construction of a soviet nuclear missile base in Cuba. President Kennedy set up a naval blockade and demanded the removal of the missiles. War was averted when the Russians agreed to remove the weapons on 28th October.
The fall of Berlin Wall; in 1961 Berlin wall was built and borders sealed between East and West Germany. In 1989 the wall was torn down.
Answer:
A resident of Missouri crossed the border on election day and voted for slavery