According to the Gettysburg Address, why should Union soldiers continue to fight in the Civil War after such a horrific battle in Gettysburg?

What is the name of the social stratification set up by the vedic peoples of the indus river valley civilization

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 a. primary sources are historical documents, and secondary sources are modern-day documents.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.

Where did the first african american fighter pilots begin training?