Vespa 150 TAP (Troupes Aéroportées)
In the late 1950’s the French Airborne Forces devised a system to transport a USA-sourced 75mm recoilless rifle via scooter. A two-man team, each with his own scooter (one carrying the rifle, the other ammunition), would be dropped via parachute (into Algeria, mainly). This is an excellent example of choosing the minimum vehicle and system required to accomplish the goal. (I suspect that ‘roadside bombs’ and the like were somewhat less common in the theatre of operations, however.)