Can be set to "yes" or "no" and determines whether or not this InfantryType can enter a VehicleType and capture it in a similar manner to an Engineer capturing a BuildingType. In RA2/YR this behaviour only works if the unit also has Thief set as yes, otherwise it only gets the "enter" cursor on a unit, but cannot in fact enter it. This is then further complicated by the fact that Thief also allows the unit to enter a refinery to no effect (in RA it allowed the unit to steal a percentage of money from the other player). To fix this the unit either requires Agent set to yes (giving full RA2 spy abilities) or Infiltrate set to "no". NonVehicle set to "yes" on a unit prevents a VehicleThief from capturing that unit.
