Yup! You're right! That straight, short barrel and wide mouth mark it as a pure howitzer, designed for lobbing shells at restricted range and close-in work. From everything I've read they're not the kind of gun you'd be too thrilled to assault up close, although these pieces were at a horribly distinct disadvantage in a counter-battery duel with rifled guns. At one time in the Western Theater both sides felt that mixed batteries were the way to go, although this was as much dictated by a shortage of good pieces as much as anything else. The Federal army that marched to Murfreesboro generally had six-gun batteries composed of a pair of long-range rifles, a pair of Napoleon gun-howitzers, which the gunners referred to as "Executive Pieces," if it could get them, and a pair of smoothbore howitzers. The different type sections were supposed to be able to provide the battery with the capability of engagement in almost any situation it happened upon. In truth it was both a headache for the Ordnance officers to keep the various ammunition types available for each battery and limited the weight of metal a single battery could provide.
General Jos. C. Meyer
Commander, Army of the Tennessee
Union Army Chief of Staff
