KAOS: What are the 4 aristotelian elements?

Questions

as what was lincoln park in chicago originally used?

what became a national holiday in the u.s in 1890?

christmas became a national holiday in the u.s in 1879, 1890 or 1895?

during the u.s civil war, what did 22 union army blacks win?

during the u.s civil war, how many blacks served in the union army?