Not discouraging further answers, but you may be interested in this podcast and older thread featuring u/iphikrates:
https://www.reddit.com/r/AskHistorians/comments/90ha3e/askhistorians_podcast_116_debunking_300s_battle/
https://www.reddit.com/r/AskHistorians/comments/4ikgfe/how_historically_accurate_is_the_film_300/d2z7xf5/