What major technological advancement is used to destroy Guernica and change warfare forever?

Which of the following is an example of the pull factor known as economic migration? a. better educational opportunities pulling people towards a new country b. mexican laborers entering the us to work in agricultural jobs c. joining family members that are already in a new country d. crop failures driving people away from their country i am unsure on this question, i was thinking b? but i could be wrong.

Which statement describes an important outcome of the congress of vienna? a. napoleon launched his final european military campaigns. b. european states had their borders clearly defined. c. jewish people were given equal right in germanic states d. the slave trade became increasingly important to european economies.

Since the 700 what was the relationship between muslims and christians on the iberian peninsula? how does this relationship impact the desire of christiannations in the iberian peninsula to spread christanity?