The First World War: The Eastern Front Explodes (Part 5)

While the Western front was raging following the outbreak of the First World War in 1914, what was unfolding on the Eastern Front? Why was it an even bloodier and more brutal arena than the West? As Austria took on its great antagonist – the spark of the entire war – Serbia, why were its early campaigns constantly blighted by disaster? What terrible mistake did Russia, with its behemoth of an army, make? How would its dramatic war with Germany unfold? And, would this be the beginning of the end of the Habsburg Empire?