Complex sentence: The Consultation appointed him commander-in-chief of the Provisional Army of Texas charged with raising a paid force of 2,500 troops, and he issued a Proclamation on December 12 calling for volunteers to enlist in the army.
Split into simpler sentences: The Consultation appointed him commander-in-chief of the Provisional Army of Texas charged with raising a paid force of 2,500 troops. Houston issued a Proclamation on December 12, calling for volunteers to enlist in the army.