I am going to say 1 because it started 2.5 billion years ago and is still hapinung today
Lords/Kings they control the the land and split it up Kings had rule under all land they owned.
Answer:
Du Bois was a doctoral student at Friedrich-Wilhelms-Universität, was the first African American to receive a Ph. D. from Harvard University (in 1895), and was awarded an honorary doctoral degree from Humboldt-Universität in 1958.
Explanation:
Airplanes were vital for ww1 to ease transport of amo and soon guns on the planes including bombs this made it easier for to launch quick air strikes on places like bases vulnerable to air strikes
