Why did the major powers of Europe get involved in ww1?

The major powers of Europe were drawn into World War I due to a complex web of alliances, nationalism, militarism, and imperial ambitions. The assassination of Archduke Franz Ferdinand of Austria-Hungary in 1914 triggered a series of diplomatic crises, leading Austria-Hungary to declare war on Serbia. This action activated a network of alliances, with Russia supporting Serbia and Germany backing Austria-Hungary, ultimately escalating the conflict into a full-scale war involving all major European powers. Additionally, competition for colonies and global dominance fueled tensions, making conflict almost inevitable.