Complex sentence: Steimer had helped write and print the handbills which condemned the war and President Wilson, especially his recent decision to divert U.S. Army troops to Archangelsk, Russia to fight in support of anti-communist White Army forces and against the Bolshevik Red Army.
Split into simpler sentences: Steimer had helped write and print the handbills which condemned the war and President Wilson. The group was especially angered by Wilson's recent decision to divert U.S. Army troops to Archangelsk, Russia to fight in support of anti-communist White Army forces and against the Bolshevik Red Army.