On the same note, people... what is your favorite era for a galley slavery fantasy? Of course, they cannot be fully historically accurate, since the idea of galley slavery and especially female galley slavery is rather a fantasy, but I will lay down a few examples:
1. Antiquity. The good old Roman Empire, which became almost the archetype of all forms of slavery. Slave girls rowing across the Mediteranean Sea, or perhaps, even working on war galley during the Punic Wars, ending up with fresh galley slave girls from Carthage.
2. Dark Ages. The Roman Empire fell, and the barbarians took over the ruins of this once great civilization. Many once noble women are now the slaves of the Goths, who will use them as galley slaves, helping them transport the luxuries stolen from the Italian Peninsula up to northern Europe.
3. Medieval Era. The creativity can really flow here. Going from up north, with the Viking Longboats, manned by slave girls, all the way down to the Ottoman Empire, using their galleys to dominate the Mediteranean, manning their ships with Greek, Bulgarian, Wallachian, Arabic and Spanish slave girls.
4. Colonial Era. Colonial empires using slave girls for their galleys. Pirates using captured women. Huge naval battles, where the overseers are manning the cannons while the slave girls put their back into it, trying to get their galley out of the range of the enemy cannons.
5. The Current Times or even The Future. After some supposed series of disasters (perhaps a nuclear war), large sections of the world are thrown back into the Middle Ages. In order to save up on the expensive and rare oil, the modern ships are often replaced by galleys manned by slave girls that were once just usual women, going to college, posting on Cruxforums in the evening and all that.