Question

Reason for war declarations with Germany on Russia ww1​

Answer 1

The Serbian Expansion and Russian role in the Balkans.

Combined with the increase in Russian military strength, both Austria and Germany felt threatened by Serbian expansion; when Austria invaded Serbia on 28 July 1914, Russian Foreign Minister Sergey Sazonov viewed it as an Austro-German conspiracy to end Russian influence in the Balkans.

On 30 July, Russia declared general mobilization in support of Serbia; on 1 August, Germany declared war on Russia, followed by Austria-Hungary on 6th.