← WWI and the roaring 20's Export Options Alphabetize Word-Def Delimiter Tab Comma Custom Def-Word Delimiter New Line Semicolon Custom Data Copy and paste the text below. It is read-only. Select All Isolationism avoiding involvement in other countries' affairs. Imperialism building empires by imposing political and economic control over peoples around the world. Spheres of Influence areas where another nation has economic and political control. Isthmus A narrow strip of land connecting two larger areas of land. Dollar Diplomacy A policy based on the idea that economic ties were the best way to expand American influence. Militarism The glorification of the military. Nationalism Pride in one's nation or ethnic group. Stalemate A deadlock Trench Warfare Soldiers fire on one another from opposing lines of dugout trenches. Lusitania A British passenger liner that was sunk by a German U-boat in 1915. 128 Americans were killed and Americans were outraged. Mobilize To prepare for war. Convoy A large group of merchant vessels sailing together. Communism An economic and political system based on the idea that social classes and the right to own private property should be eliminated. Armistice A halt in fighting that allows peace talks to begin. Self determination-The right of a group to decide its own form of government. Reparations payments to cover war damages.