I design primarily for the Interwar and WWII periods, and in 1:100 scale for 15mm gaming.
These days I print models almost exclusively in resin, but wherever it is feasible I design with tolerances suitable for FDM as well.
This is a set of six generic vehicles, two cars and four light trucks or delivery vans, such as would be common in the towns and cities of the 1930s. They could be used as commandeered transports, or just as scene fillers for city streets.
The models have been built for 6mm gaming, but they could be scaled up to 1/200 or even 1/100, if you don’t mind the lack of detail too much.
Being so small (only about 15mm long) they’d be best printed in resin. If you have to print them by FDM, I recommend using Cura’s experimental “Make Overhangs Printable” feature, which will fill in underneath between the wheels — if it’s painted dark, the blocking-in isn’t really visible on the gaming table.