Which caused serious conflict between native americans and colonists?

Which of the following groups of sentences most accurately describes the cuban missile crisis?

Approximately how many americans, from both the north and the south, were killed in battle during the civil war?

What is the main difference between primary and secondary sources? a. primary sources are historical documents, and secondary sources are modern-day documents. b. primary sources are derived from museums and archives, and secondary sources are created by history students and academics. c. primary sources are found in ancient places with a rich history, and secondary sources are found in historical journals and blogs. d. primary sources are created during a particular historical era, and secondary sources are created by studying primary sources.