What is the rhetorical effect of triple parallelism (triad/tricolon) ?

Tricolon and parallelism

The tricolon (also called triple or triad) is a rhetorical device through which speakers list or name three things or actions in a row. The tricolon is meant to add power to words and make them memorable.

astronomers is your final answer! : )

no because after the troops were pulled many blacks were killed by hangings lynchings and other cruel ways which in a way interrupted the reconstruction of the south and differed from the way abraham lincoln had an idea of reconstruction