Complex sentence: As a result of the Treaty of Versailles, which was signed on 28 June 1919, the German Army was downsized to a standing army of 100,000 men and renamed the "Reichswehr" (Defence of the Reslm) in the era of the Weimar Republic.
Split into simpler sentences: As a result of the Treaty of Versailles which was signed on 28 June 1919, the German Army was downsized to a standing army of 100,000 men. The German Army was renamed the "Reichswehr" (Reich Defence) in the era of the Weimar Republic.