This might be him:
"Captain Collins was 60 years old and one of the best known men in Missouri. At the age of 18 he helped organize a company, joined General Shelby's command as second lieutenant, soon took charge of one of the batteries, and, by his intrepid daring and good generalship, gained an enviable reputation before he had attained his majority. He served throughout the war and was in many a hot fight.
Find A Grave Memorial # 6228195