How did the discovery of gold in 1848 change California

People from other countries rushed to California to (hopefully) get rich. The U.S. population grew by a LOT.

Explanation:

ww1 weapons: tank. tanks were used for the first time in the first world war at the battle of the somme. they were developed to cope with the conditions on the western front. the first tank was called 'little willie' and needed a crew of 3.