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| Alliance Pilsudski, Josef Klemens |  |
| 26th Jan Warsaw Attempts to undermine France's alliances with Eastern Europe |
| 26th Jan Warsaw Signs a treaty of non-aggression with Hitler |
| Assassination of Pieracki Pieracki, Bronislaw | |
| Assassination of Bronislaw Pieracki |
| Death of Curie, Marie Curie, Marie Sklodowska | |
| Sallanches Death of Marie Curie, leukemia, from aplastic anemia, almost certainly due to massive exposure to radiation |
| Death of Curie, Marie Sklodowska Curie, Marie Sklodowska | |
| Warsaw Death of Marie Sklodowska Curie |
| Death of Pieracki, Bronislaw Pieracki, Bronislaw | |
| Death of Bronislaw Pieracki, assassinated |
| Diplomacy Beck, Josef | |
| Warsaw Begins a policy of non-aggression with Germany |
| Health Curie, Marie Sklodowska | |
| Sallanches Death of Marie Curie, leukemia, from aplastic anemia, almost certainly due to massive exposure to radiation |
| Minister of Interior Koscialowski, Marjan | |
| Appointed Minister of Justice, after the assassination of Pieracki |
| Pact Beck, Josef | |
| Warsaw Poland concludes a non-aggression pact with Russia |
| Prime Minister Kozlowski, Leon | |
| 15th May Warsaw Appointed Prime Minister of Poland |
| Theory Probability Mazurkiewicz, Stefan | |
| Publishes a theory of probability |
| Treaty of Non Aggression Pilsudski, Josef Klemens | |
| 26th Jan Warsaw Signs a treaty of non-aggression with Hitler |
