Why did many european nations quickly join world war i following the assassination of archduke ferdinand in 1914?

They had pledged to fight with other countries.

Explanation:

After the death of archduke Ferdinand in 1914 bunches of nations immediately joined World War I since they had officially swore to battle with nations according to their own allegiances. The territory for war was basically set, and unions were at that point made, the interests were known and on the table for couple of years before that, so the death of archduke Ferdinand was only the point that denoted the beginning stage of the practically unavoidable war.

answer: secession

secession, as it applies to the outbreak of the american civil war, comprises the series of events that began on december 20, 1860, and extended through june 8 of the next year when eleven states in the lower and upper south severed their ties with the union. the first seven seceding states of the lower south set up a provisional government at montgomery, alabama. after hostilities began at fort sumter in charleston harbor on april 12, 1861, the border states of virginia, arkansas, tennessee, and north carolina joined the new government, which then moved its capital to richmond, virginia. the union was thus divided approximately on geographic lines. twenty-one northern and border states retained the style and title of the united states, while the eleven slave states adopted the nomenclature of the confederate states of america.

explanation:

first industrial revolution - the first wave of the industrial revolution lasted from the late 1700s to the mid-1800s. it industrialized the manufacture of textiles and began the move of production from homes to factories. steam power and the cotton gin played an important role in this period.