english: Germany, because it had an alliance with Austria, told Russia to stop mobilizing, which Russia failed to do, so then Germany mobilized its own army, declared war on Russia, cemented an alliance with the Ottomans, and then declared war on France, because, you know, France.
non_english: Nemačka, jer je bila u savezu s Austrijom, tražila je od Rusije da se povuče, što je Rusija odbila, pa je Nemačka mobilisala sopstvenu vojsku, proglasila rat Rusiji, zacementirala savez sa Otomanima i potom objavila rat Francuskoj jer znate, to je Francuska.