I just found out that the brand "Navistar" had been created.
https://www.imcdb.org/vehicles_make-Navistar.html

Two of the vehicles referenced are military vehicles that have also been referenced under the make "International".
https://www.imcdb.org/vehicle_1899332-Navistar-7400-SFA.html
https://www.imcdb.org/vehicle_1055262-Navistar-MXT-2010.html

Official Make is "Navistar Defense", military branch of Navistar International.
https://www.nddefense.com/
https://en.wikipedia.org/wiki/Navistar_Defense_LLC

So we should rename them under the make "International"?
Or if you want to be correct, rename them under the make "Navistar Defense".
These are the vehicles concerned:
https://www.imcdb.org/vehicles_make-International_model-MaxxPro.html
https://www.imcdb.org/vehicles_make-International_model-MXT-MVA.html
https://www.imcdb.org/vehicles_make-International_model-MXT-APC.html
https://www.imcdb.org/vehicle_1899332-Navistar-7400-SFA.html
https://www.imcdb.org/vehicle_1055262-Navistar-MXT-2010.html
https://www.imcdb.org/vehicles_make-International_model-7000+MV.html
https://www.imcdb.org/vehicle_248837-International-7400-MV-2005.html
https://www.imcdb.org/vehicle_1915304-International-7400-2006.html