In 480 B.C., the new Persian king sent a massive army across the Hellespont to Thermopylae, where 60,000 Persian troops defeated 5,000 Greeks. The year after that, however, the Greeks defeated the Persians for good at the battle of Salamis.
1. (Weightlifting) the sport of lifting barbells of specified weights in a prescribed manner for competition or exercise.
A set is the amount of repetitions one lifts in weight training in one setting. For example, if you lift 150lbs. 10 times, that's one set. The repetition is how many times the weight was lifted. In the example, it would be ten times.