Doppelsöldner (“double-mercenaries”, “double-pay men”,[1] from German doppel- meaning double, Söldner meaning mercenary) were Landsknechte in 16th-century Germany who volunteered to fight in the front line, taking on extra risk, in exchange for double payment.
Doppelsöldner has entered the chat 😎
https://en.wikipedia.org/wiki/Doppelsöldner