Behold the strangest war machine of the 20th century, the Vespa 150 TAP.
Built in the early 1950s on the popular Vespa scooter, the 150 TAP features a M20 75mm anti-armor cannon that could penetrate armor up to 100 mm thick.
The light weight anti-armor scooter was designed for paratroops, hence the French name Troupes Aéro Portées or TAP.
The cannon featured a special vent designed to mitigate recoil without any mechanical system or heavy-duty mount. The cannon was never intended to be fired from the Vespa, but could be rapidly removed and mounted on a simple tripod.
Paratroopers would be dropped in two man teams, each with a pair of Vespas. One would carry the weapon and a few rounds while the other carried extra ammunition.
More than 500 units were produced and they were incredibly cheap to build given the high number of available M20s and affordable cost of the Vespa.