Later in history, one of the major greek cities fought off the persians at the tiny seaport town of marathon. most likely, which city was it? why?

This greek city was athens. the reason they went to war was because the persians controlled many ionian city states who rebelled against the persians. the ionian city states won with the help of athens. because of that, the persians were mad at the athens and tried to conquer them at marathon.