They were the first african american military aviators in the united states armed forces, they were formally known as the 332nd fighter group and the 99th pursuit squadron, they were called the "redtail angels" by the bomber crews they were assigned to escort and protect, which famous world war ii african-american unit is being described?

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 a. primary sources are historical documents, and secondary sources are modern-day documents.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