Wikipedia has a stalemate history section, but for France it only says:
The forfeiture of Black's turn to move (medieval France) (Murray 1913:464–66) (Davidson 1981:64–65), although other medieval French sources treat stalemate as a draw (Murray 1913:464–66).
Forcing a passed move is a very interesting stalemate rule. It would mean KNNvK could force a checkmate by first forcing stalemate, then Black passes, then White delivers checkmate.
(But not all stalemates necessarily lead to checkmate. There may be some material that can force a stalemate but cannot make a checkmating move right afterwards. An example is black king at d8, white bishop at d7, white king at d6. Black to move is stalemate, but even if he passes a turn, White has no move that can checkmate him. White couldn't force that position alone, of course. It's just an example of stalemate that doesn't lead to checkmate.)
Anyway, the "medieval France" is not qualified in the article. I would guess 1000 - 1600?
I would like to know what was the stalemate rule in France around the Revolutionary and Napoleonic times? 1789 - 1815.