Starting on the Spanish Civil War

 This weekend I was gifted with a handful of minis which may be very loosely interpreted to represent 1/72 Spanish Civil War troops. This is a war I know almost nothing about, other than a bit of literature, folk music and aviation. What I have now is basically WWII stuff, though with paint jobs and a little imagination it'll work.

Toy vehicles. I can identify the Daimler armored cars
(well past the period but fair stand-ins), but not the tank.

70-80 cheap toy soldiers. About a third have
rifles, a third bazookas, and a third pistols.
These can represent Russians or possibly Italians.

1945 Germans, so includes some Volksturm. The Wehrmacht
can represent Germans or Spanish line infantry, while the
armed civvies could make militia of either side.

Some nice lasercut wooden bases.

Since both rulesets I've found are "high-level", with single bases representing platoons or companies, even this small collection should be enough to experiment - Graham Evans' complex For Whom the Dice Rolls and Bob Cordery's three-page rules from Wargames Illustrated #13. Both have mechanisms to represent the conflicting relationships between troops of different political backgrounds, which seems to be the key element of any SCW ruleset.