Ho Chi Minh had a fleet of bikes, that were what we would called a Long-Tail. Basically, a set of steel pipes were welded in to give what would be like an Xtracycle is today.

Generally, one bike would carry the Mortar, and the other ten bikes would carry Mortar Rounds, and the shelling went on just about every night. This was before the Americans invented the Mountain Bike, so there was no way to chase them off.