Complex sentence: In the post-Civil War period (after 1865), African Americans were able to obtain surplus military bass drums, snare drums and fifes, and an original African-American drum and fife music emerged, featuring tresillo and related syncopated rhythmic figures.
Split into simpler sentences: In the post-Civil War period (after 1865), African Americans were able to obtain surplus military bass drums, snare drums and fifes. As a result, an original African-American drum and fife music arose, featuring tresillo and related syncopated rhythmic figures.