Yeah. Again you have huge build ups in the Royal Italian Army, The Red Army, The French Army, the British Navy, The German Navy... Those are just off the top of my head. There is so, so much info on the interwar period. Historians are constantly looking at that time frame because it is immediately after the second industrial revolution, during a global depression, the first major attempt at world government... Incredible leaps in medical, aviation, industry,.. this terrifying rise of Fascism/nationalism with some really horrific pseudoscience beliefs attached. Pick a geographic area and just search "x area 1930s"
***Soviet Union and yeah. Stalin had his 5 year plan(s). So there was a huge labor demand. This is opening a whole other massive topic that is to long to type on mobile. You can't think in a modern conscription sense. The Army was likely the only job around for most, 3 squares and place to live. The great depression wasn't just in the US so you can see how it would be easy to get sucked in. Add in Nationalism and Fascism, bitterness from devastation of WWI. Some saw this as a national duty to rearm and rebuild the army. So they would be looking for young men from every territory for labor/soldiers/sailors. I mean you can look basically any where on earth during the 30s and see that everyone was just getting ready for round 2
I think you should consider the build up of armies/navys on the 30s. Also some pretty quick runs into Fascism. Red army was taking tons of people for the meat grinder
There were massive buildup of standing armies. Particularly France with their mobilization to construct and man the Maginot Line. Germany and England began reconstructions of huge and modernized navys. Italy was full throttle Fascism around this time. And yes, Japan was moving some serious weight into China
Indeed, is there more you want to comment? Or is there more you would like to know about the 1930s in Europe? Now I understand that I am taking a liberty with the assumption that OP is referring to European heritage, but I could direct you to a book or two to expand your knowledge of history
It's like an HOA but for everything