Camisade

noun

1. An attack by surprise at night or at break of day: probably so called because made by soldiers wearing shirts over their armor, in order that they might be recognized by their friends in the dark.
2. A shirt worn by soldiers over their armor in a night attack to enable them to recognize one another.
3. A shirt worn by soldiers over their uniform, in order to be able to recognize one another in a night attack.
4. An attack by surprise by soldiers wearing the camisado.