One of the problems for Greece when it went to war with Italy in WWII was it's lack of industrial automotive base. In OTL, different major manufacturers (Ford, Chevy for example) set up plants in different European countries, including in Eastern Europe. Greece is a central location for both S. Eastern Europe and the near eastern countries, and even the Soviet Union. As such it seems a good place to set up shop and sell vehicles of all types, tractors, trucks, automobiles. Doing this would increase Greek revenues, raise the standard of living, and enable them to have a more robust military capability.
The US makers in particular seem to have had more of a capacity to invest overseas than European makers. That could simply be due to proximity negating the need for a new plant when they could just ship it by rail or cargo ship, or domestic concerns such as union opposition. I've done a small amount of research into this online, and have not gotten very far. I'd appreciate your thoughts and input.