Which event lit a “powder keg” in europe and led to the start of world war i? russia joined a war between austria-hungary and serbia.  austria-hungary declared war on serbia due to ethnic uprising. archduke franz ferdinand was assassinated by a serbian nationalist. archduke franz ferdinand stopped a revolt of serbian nationalists.

Me! these questions are based on american people in the south essential questions: question 1: for what reasons will one group of people exploit another?focus questions: question 1: what influenced the development of the south more: geography, economy, or slavery?question 2: what were the economic, political and social arguments for and againsts slavery in the first half of the 19th century.