one of the main causes of WWI was____
this factor was the most significant in causing wwi because__
1 answer
the assassination of Archduke Franz Ferdinand of Austria-Hungary by a Serbian nationalist. This event sparked a chain reaction of alliances and ultimatums between European powers, ultimately leading to the outbreak of World War I. It was the most significant factor in causing WWI because it directly triggered the series of events that escalated into a global conflict.