What sparked started World War I by setting powder keg of nationalism that had building in Europe in the period prior to 1914

Which of the following inventions most directly allowed ancient farmers to produce a surplus ?

Between 1820 and 1860, the united states received a huge number of immigrants from european nations. on the map, identify the state where the most immigrants moved in search of jobs.

What was the role of the samurai in japan before imperialism?