I found this little quote on anothe forum about Spaniards serving with the Soviets.
"Spanish soldiers are not only in german side.few spanish officers are translators(sp.) in polish Independent assault battalion(SF unit) in Soviet Russia."
and this too,
Although Spain didnīt fight in the IIWW, actually thousands of spanish fought in that war that was a continuation of Spanish Civil War(1936-39). The most known commintment of spanish in IIWW is that of 250InfantryDivision in the Wehrmarcht(45.000 to 50.000 spanish served there), and this is due to the fact that Franco won the spanish war and so the history of that time was written by the winners, and so the fight of spanish republicans in IIWW simply is unwritten until the most recent years, when the most of them are died, and due to the fact too of that many spanish republicans fought in France in the so called "french resistance", foreing fighters fit badly the official history of France who mostly accepted peacefully the defeat and supported the regime of Vichy.
Actually, many more spanish fought with the allies than with the germans. A number of 20.000 spanish died in the IIWW, not a small number for a country that didnīt joined to that war, and only 4.000 of them died wearing the german uniform. As an example, itīs widely known the experience of spanish pilots who fought in the Blue Squadron, an air unit who fought in the central sector of russian front, they got about 170 victories in their time of service, but many spanish flew russian planes and only the ones flying fighters planes got more than 200 victories over the germans, and there were many of them too flying the so called "jabos"(air-to-ground attack planes), some of this spanish pilots arrived to Soviet Union in 1937-38 when they only were evacuated children.
A select group of spanish soldiers who fought in the first moment in the Moscow front the winter of 1941 were trained the next spring and parachuted behind the german lines as a partisan unit in Ucraine, and they got many achievements unknown in the west, not in Russia. The core of this spanish guerrilla were guerrilleros graduated in the Guerrilla School set up by Spanish Republic back in 1936-37, perhaps the first training center of this kind in west europe, and they followed their fight against fascism in Russia. Some of this spanish commandos fought too in NAfrica both with frenchs and english, and some of them even trained the firsts groups of the Long Range Patrols. Perhaps the most notorious action guerrilleros did in the East Front was the assault to a german airfield with the purpouse of capturing a german craft and flying it to russian lines, and thatīs what they did.
In the western side, thousands of spanish were detained by frenchs as forced labour workers when the Wehrmach invaded France, and they usually grabbed the weapons left by the frenchs to fight agaisnt germans, and after the defeat they formed the first resistance groups, in part because they were anti-fascists and in part because they had to fight for their lives since they were persecuted both by germans and gendarmerie by the only fact of being republicans, being communists or not. Prior to that, a great group of republicans were oblied to join the french legion, and many of them fought and died in the expedition to Norwege and are buried in Narvik. Another great group of spanish were detained in the french North Africa, some of them could join the forces of De Gaulle since the first moment and fought in all the combats of frenchs free forces in Africa, namely in the battle of Bir Hakeim, where the spanish reps were outstanding.
When the allied invaded french north africa, all the french legion joined to the allied fight and the spanish with them, but many spanish deserted of the french legion to joining the french II Armoured Division of Leclerq, that was being set up with american equipment. The republicans of IIDivision were usually the spearhead, about 500 landed in France and only about 15 of them survived to the end of the fight in Bertchesgaden. As an added note, many of this republicans of the IIADivision were from the CNT, the anarchists trade union, and after the fall of Paris, they restablished their links with their spanish fellows in France, and a group of spanish resistants attached unofficially to the IIADivision in their way to Germany border, fighting with them and gathering all the weapons they could for fighting in Spain after the defeat of Germany. Btw, the spanish role in french resistance was even bigger than many frenchs like to recognize. Spanish resistants fought in all the big open battles of maquis, which usually resulted in defeats btw, since they hadnīt enough fire power against the germans. In some areas of France the only "french" resistance was "spanish" resistance, like the area of Toulouse, which was liberated by spanish republicans by the way the same that Foix. The same in the region of Bordeaux, where the role played by the basques units was great. More over, 7.000 spanish died in Mathaussen concentration camp, in Austria.
As an anecdote, a spanish republican soldier was exiliated in USA. He was a former asturiano(from Asturias) miner member of communist party and he was far from any help from his camarades. So when Hitler invaded Soviet Union he asked to travel there for fighting, by they said to him the travel was difficult and expensive, so it was better he waited in USA for a better chance, so when japanese attacked Pearl Harbour he asked to their camarades what to do, and they said him to join the american army, since the "capitalists" were alllied now, so he thought a unit called "marines" were enough good for him, and so he fought all the Pacific campaing, he was injured twice in Okinawe and finished the war as a sargeant of Marines and with some medals hanging of his chest. That man could remain living comfortably in USA as a war heroe after being fighting 10 years and so enjoying the richest country of the world, but he prefered going back to Spain in 1946 as a guerrillero against Francoīs regime, and for sure the Spain of that time was the hell compared with USA. The former miner was captured and sentenced to death. Luckily he was indulted and spent about 15 years in prision. I talk of this case because is the only I know of a spanish republican fighting with americans, but like him there were thousands fighting in europe. Btw, Iīm proud too of the behaviour of spanish who fought in the 250IDivision, they didnīt nothing shameful.
I donīt share communists nor anarchist ideology of course, but I admire the most I can those men, who were probably among the best fighters of their time, second to nobody, but most important is that they fought for their beliefes even in the worst moments, they had chances for having a better life but they chose the hardest way, many soldiers of IIWW only served few months in the front, but this men began their war in 1936 without any stop to 1939. And when the IIWW they fougth since the first moment to the last shot in 1945.
The Ghost Battalion: Spaniards in the Waffen-SS, 1944-1945 [Archive] - Military Photos