During his time at the Conference of Ambassadors, Massigli was closely involved in the disputes about Upper Silesia, the Memelland, the &lt;a href="Polish-Lithuanian%20War"&gt;Vilnius/Wilno dispute&lt;/a&gt;, the borders of Austria and Hungary and the enforcement of Part V of the Treaty of Versailles (which dealt with disarmament). In the early 1920s, Massigli was known for his vigorous efforts to enforce Part V and attempted to thwart German efforts to violate it. In Massigli's view, the French should be moderate in the enforcement of Versailles, but in return, the Germans must obey all of the articles of Versailles, especially Part V. As Massigli wrote, "The touchstone for Germany is the execution of the Treaty, or at least, since I am prepared to believe that certain of its clauses cannot be applied, to give evidence of goodwill in its execution. The starting point must be the disarmament of the "Reichswehr"". In September 1923, during the Ruhr crisis, Massigli was sent to the Rhineland to report to Paris on the viability of the Rhenish separatist movement, and what support, if any, France should offer the separatists. Massigli was very cool in his assessment of the Rhenish separatists, whom he described as badly organised and lacking in popular support and advised against support for a Rhenish Republic.