Why Did Russia Send Troops To The Border Of Austria-Hungary In 1914? Austria-Hungary Had Invaded Serbia, And Russia Was In An Alliance With Serbia. Austria-Hungary Was Threatening To Invade Russia. Austria-Hungary Was Sending Its People To Live In Russia. Austria-Hungary Needed Help Resisting A German Invasion.. Russia's support for serbia, which had been annexed by austria. As the conflict escalated with the invasion of serbia,

This military mobilization was rooted in the. As the conflict escalated with the invasion of serbia, The russian empire's entry into world war i unfolded gradually in the days leading up to july 28, 1914.