How did World War 1 begin and what event caused World War 1?

In what year was World War 1 World War 2? What country sponsored Pizarro? What kinds of new technology enabled Europeans to explore the world? What powers did Eos have? What were the most important items traded in the 1400s? Can everyone in this world be equal? What were the countries fighting with Germany during WW1 called? How did the Gupta Empire grow powerful? What are the countries in the world that avalanches have occurred? What nation became a world leader in map making during the eighteenth century? What wrong did Louis xvi committ? How many people worked in concentration camps in world war 2? What materials were used to build the spinnaker tower? The battle of tannenberg was one of the first major battles in World War 1 true or false? How did sanjay Gandhi die? What did William Withering discover? Why did hundertwasser change his name? What does Isabella mean? What did King George III do to make people angry? What was the Germans attitude after world war 1?