In the early 20th century, Ashkenaze Jews formed a sizeable minority throughout eastern Europe, with its own language--Yiddish--, a vibrant culture and plenty of talent to spare. A city like Odessa, for example, was one-third Jewish. Your challenge is to find a plausible way for a specific region in eastern Europe to become an independent, Jewish-majority country sometime between 1914 and 1935. It should be larger than a city-state, and preferably not landlocked, but precise size and location are up to you. One specific requirement is that it involve no large-scale deportation, because considering the way things turned out in OTL, that would be rather a cop-out (population transfers are acceptable).