The Treaty of Versailles forced Germany to grant territories to Belgium, Czechoslovakia and Poland and to give up all of its colonies. It forced Germany to reduce its military forces to 100,000 men and allowed for the occupation of the Rhineland by the Allied forces. Germany was forced to accept full responsibility for initiating World War I. France demanded huge reparation payments. The defeated powers felt the Treaty was unfair and soon violated the military and financial conditions. When Hitler came into power, he promised to take back the German territories and to demilitarize the Rhineland. The promise of becoming a world power again made the people support him. On September 1, 1939 Hitler invaded Poland. France and Britain declared war on Germany two days later. This was the beginning of World War II.
Trade Restriactions would be a good title. Embargoes limit and restrict trade between nations, Quotas limit the quantity of goods being traded, Subsidies make certain goods cheaper to produce in foreign markets, and a Teriff is a tax put on imports and exports.
However, determining the precise beginning and ending to any "period" is often arbitrary, since it has changed over time over the course of history.
Since the development of industrial society, more and more jobs were replaced by simple machinery and it focus the spread of job availability to only several areas in united States.This caused the decreasing rate of wages or even employment within the u.s society, and the economic pressure eventually lead to class violence
