How did the assistance of the archduke of austria-hungary lead to war between russia and germany?

(1) Answers

You ment assassination of archduke Ferdinand ofcourse not assistance? Killing of Archduke in Saraievo by Serbian nationalist Gabrilo Princip was a spark that set up Europe on fire, Austria-Hungary had no other option to declere war with Serbia and russia as Serbia's ally decided to help them and declered war on Austria-Hungary Germany which were seeking for casus belli imidetly joined Austria-Hungary to made this conflict European and world war

Add answer