Serbia is responsible for WWI similarly to Poland being responsible for WWII.Not really. Austria used the assassination of Franz Ferdinand to attack Serbia. Austria was looking for any excuse in years prior to attack Serbia. In order to secure it as a "colony." It was mad that Serbia got Independence as it wanted Serbia for itself. Serbia knew it was too weak from fighting the Balkan Wars to engage in a a major conflict with Austria, and prior to 1914 complied with every demand Austria gave the small country, even the most unreasonable ones.