Just to add a little more to what has been said.
In the 1970s, the Deetail series consisted of a number of ranges. The soldiers were sold in various multi-piece sets, as well as individually. Like all toys, complete sets in the original box are worth much more than individual pieces. To the best of my recollection, the ranges were:
Civil War Union -- 6 infantry and 6 cavalry, Gatling gun w/ 2 man crew
Civil War Confederate -- 6 infantry and 6 cavalry, Gatling gun w/ 2 man crew
The Union and Confederate soldiers came from the same molds; they were just painted differently.
Cowboys -- 6 foot and 6 mounted
Indians -- 6 foot and 6 mounted
Mexicans -- 6 foot (I don't recall mounted -- anyone else?)
Apaches -- 6 foot (I don't recall any mounted)
French Foreign Legion -- 6 infantry, 6 cavalry, Gatling gun w/ 2 man crew
Arabs -- 6 foot, 6 mounted
Waterloo British -- 6 infantry (3 line, 3 highland) 6 cavalry (2 Life Guards, 2 Hussars, 2 Scots Greys)
Waterloo French -- 6 infantry (3 line, 3 Guards) 6 cavalry (2 Carabiniers, 2 Cuirassiers, 2 Chasseurs -- sorry, I'm bad with French!)
Knights -- 6 foot, 6 mounted -- other foot figures added in 1980s
Turks -- 6 foot, 6 mounted
WWII German Wehrmacht -- 12 foot figures (2nd 6 released late 70s/early 80s), mortar w/ 2 man crew, motorcycle with dispatch rider, kettengrad, kubelwagen with 2 man crew, PAK 40 gun (no crew).
WWII German Afrika Korps -- 6 foot figures, kubelwagen with crew
WWII British ETO -- 6 infantry, mortar w/ 2 man crew, motorcycle with dispatch rider, Daimler scout car w/ 2 man crew, 17 lb AT gun, 25 lb gun.
WWII British 8th Army -- 6 infantry, Vickers machine gun w/ 2 man crew, Daimler scout car w/ 2 man crew
WWII US Marines -- 6 infantry, recoilless rifle w/ 2 man crew, motorcycle with dispatch rider, pack howitzer
WWII US Army -- 6 infantry (later releases - about the time as the second set of Germans), Jeep with 2 man crew
WWII Japanese -- 6 infantry, recoilless rifle with 2 man crew.
In the 80s I think the Deetail line also included modern British paratroopers and Scots Guards.
One other item of interest. The first two cavalry figures I received (summer of '72) had tapered bases. That is, the front of the base was narrower than the back. All others that I subsequently received or purchased had uniform rectagular bases. All infantry had uniform rectagular bases. I think the new reproductions have oval bases.
Hope this is of some assistance.
Blackhat