How did the complex web of Europe alliances contribute to the outbreak of world war 1?

The complex web of alliances in Europe created a situation where a localized conflict could escalate into a broader war. When Archduke Franz Ferdinand was assassinated in 1914, Austria-Hungary's declaration of war on Serbia activated a series of alliances; Russia mobilized to defend Serbia, leading Germany to declare war on Russia, and subsequently on Russia's ally, France. This domino effect of mutual defense agreements transformed a regional dispute into a full-scale global conflict, as countries were drawn in to support their allies. Ultimately, these alliances made it difficult for nations to de-escalate tensions, contributing significantly to the outbreak of World War I.