The scenario depot, of course. I should have first thought in it.
It is not "marquis", but "maquis" or "maquisards", the guerrilla forces that operated in France during german occupation (later they formed the core of the FFI), which most of them were ex-republican army exiled spaniards. In august, 1944 a force of about 7000-15000 men (it depends on the sources used)crossed the Spain-France frontier by several points in what would be known as "Operación Reconquista". They had been told that it was the first step to depose Franco of the power and that they would be cheerfully welcomed and that the invasion would start a popular andgeneral movement, that would overthrow the fascist regime. The reality was much harsher and they found no support on the people and much difficulties than they have supposed and of course, no revolution. The armed opposition increased steadily as Franco's forces sent reinforcements (tanks included) and finally they retreated to France. The idea of an invasion "en force" was discarded and during the following years groups of guerrillas (the "maquis") infiltrated through the frontier to start cells of resistance against the regime, that wouldn't be defeated completely until the early 50's