How did a single event start a chain reaction that sparked world war l?

August 1914. It was directly triggered by the assassination of the Austrian archduke, Franz Ferdinand and his wife, on 28th June 1914. this lead to other allied countries to get involved. After the assassination, Austria-Hungary declared war on serbia with germany backing them up. germany then declared war on russia. british forces declared war on germany and eventually everyone joined in lol.

Well, like usual, war starts with the want of land or money. And the thirst for power and land is was pretty much started the world wars

was a long, primarily nonviolent series of events to bring full civil rights and equality under the law to all americans. the era has had a lasting impact on united states society, in its tactics, the increased social and legal acceptance of civil rights, and in its exposure of the prevalence and cost of racism. in the south violence and fraud in southern elections from 1868 to 1876, which had reduced black voter turnout and enabled southern white democrats to regain power in state legislatures across the south