I looked at the campers, all of them grim and determined. I tried not to feel like this was the last time I'd ever see them all together. 'You're the greatest heroes of this millennium,' I told them. 'It doesn't matter how many monsters come at you. Fight bravely, and we will win.' I raised Riptide and shouted, 'FOR OLYMPUS!' They shouted in response, and our forty voices echoed off the buildings of Midtown.
Rick Riordan (2009). “Percy Jackson and the Last Olympian”, p.127, Penguin UK