Gallienus's Invasion of the West

Some scholars think there were two invasions, the first ending with oriolus failure to capture posthumus. But most seem to think that it was all wrapped up in a single short war. When gallienus temporarily ceased hostilities, he had won back firm control of the gallic territory abutting the alps. The emperor controlled both ends of the qey mountain passes in and out of italy. Just as gallienus would never recapture the west, posthumus would never again have access to theAlps.