1. BELLWORK: Wars in the 20 th Century 1.How did the nature of warfare change during the 20 th century? What led to these changes? 2.In 7 words or less, describe Total War. 3.What is a Limited War? Examples? 4.List three reasons why Guerilla Warfare became common in the 20 th century. 5.How are causes/effects of wars categorized? 6.THINKER: How will the start of WWII impact the Great Depression in the Americas?

2. Intro to 20 th Century Warfare  Units 5-7 focus on IB HOA Topic 1 – Causes, Practices, and Effects of War, Topic 5 – The Cold War & Prescribed Subject 1 – Communism in Crisis  Major themes include: Different types of 20 th century warfare (civil, guerilla, limited, total) Origins and causes of war (long-term, short-term, S.P.E.R.M) Nature of 20 th century wars (technological advances, tactics, strategies, home front, resistance) Effects and results of war (Peace settlements, attempts at collective security, territory changes, post-war problems, S.P.E.R.M.)  These units use a case study approach and examines the above themes for WWII, Algerian War, Falklands War, Chinese Civil War, Gulf War, and Korean War

3. Timeline  The IB topic of 20 th century warfare will be broken into three major sections: Today – December 18 th : The Failure of Collective Security and WWII (Unit 5) January – February: Case studies of 20 th century warfare: limited vs. civil vs. guerilla (Unit 6) March – May: Cold War and Communism in Crisis (Papers 1 & 2 – Unit 7) We will be using handouts from the IB textbook: 20 th Century Warfare

4. Collective Security Post-WWI  For homework, you will look at the failure of collective security in preventing the outbreak of war, along with the impact of the Great Depression in Europe in the 1930’s.  As you read, take notes on: How the League worked (decisions made, settlement of disputes) Problems for the League of Nations in the 1920s Successes/Failures of the League in the 1920s  STOP reading at Ruhr Crisis, we will pick up there next class!