What was the chain reaction that led to WW1?

holocaust

Explanation:

The assassination of Archduke Francis Ferdinand sparked World War I. It caused a chain event that escalated out of control because countries were driven by the alliance system, militarism, and nationalism.

Explanation:

china unilaterally claims the entire south china sea as sovereign territory, then builds artificial islands to bolster its claim. it suddenly activates an air defense identification zone over the east china sea, and threatens to down any aircraft that does not report its position. it builds roads into indian territory, then redraws the maps to show that it is actually chinese territory. the people's republic under president xi jinping is quickly becoming the bully of asia.