What do you already know about american mindset of the vietnam war?

The internal combustion engine was an innovation of

What happened 10 million years ago? if u answer, u get 50 ! plz answer ; -;

Plz which of the following statements about spanish plantations is not accurate? a. spanish plantations grew sugarcane for export to spain b. the spanish had little concerned for the lives of the indians who worked on the plantations. c. spanish plantations grew wide variety of crops and center produce to many different european countries. d. to replace the native americans our dying off the spanish imported african slaves.