Unskilled labour is one of those terms which people often absorb from pundits or books without thinking. Its worth saying out loud that unskilled labour is labour which is common, or labour which employers can easily replace. It does not mean ignorant, or uneducated, or that anyone from a different society could do it.
After a war the winners start to argue about credit, whether the Athenians and the Spartans arguing about who saved Hellas from the Mede, or the Allies arguing about who did more to defeat Nazi Germany and Imperial Japan. And while these debates are nominally about the past, the different positions tend to correspond to different views about who should be honoured and respected in the present. Within Athens there was a debate about the contribution of leisured hoplites and working-class rowers at the same time that advocates of a narrow democracy and a wide democracy were fighting. After the collapse of the USSR, the Soviet contribution became better acknowledged in the North Atlantic world (although Soviet failures which had been covered up were also uncovered after the archives opened and the censors had to get real jobs). In the past ten years, a new view has emerged which argues that the US, UK, Germany, and Japan all put a majority of their manufacturing capacity into air forces and gave ground forces second or third priority. To them:
The Germans lost more infantry on the Eastern Front, but they lost far, far more of their equipment (and best trained forces) fighting the British and Americans. This is because the German Army as I have pointed out, received relatively little German production compared to the Air Force/Navy. Basically, because the Germans could afford to send so little equipment to the Eastern Front, they tried to get by using unsupported soldiers. Actually, the ‘vast bulk’ of German losses were caused fighting the western Allies, and its not close.