What are terms from the Treaty of Versailles that encouraged the underground development of an aggressive Germany?

Answer 1

It was probably more the fact of defeat and the revolution in Germany that created 'underground aggression' than the treaty itself that had this effect. Many hardline German nationalists also felt in some sense cheated of their victory over Russia. The dreams of boundless expansion in Eastern Europe lived on. Within Germany particular venom was directed against those who signed the armistice (whom Hitler and others routinely called the November criminals). The team that actually tried to negotiate in Paris and Versailles was not vilified to anything like the same extent. The reparations were widely seen as the harshest element of the Treaty of Versailles. For many, the restriction of the size of the army to 100,000 men was also very irksome, and this clause of the treaty was never observed. A further cause of intense resentment was two attempts to go beyond the treaty. In 1921 Polish irregulars (with the approval of the Polish government) tried to seize the plebiscite area of Upper Silesia before the plebiscite was held, and they were kept at bay by various Friekorps and units of the British Army. Then, in 1923, the French and Belgians occupied the Ruhr ...