Martin Baltimore, part two

When the Baltimore was introduced in the Royal Air Force as a replacement of the Bristol Blenheim, many pilots were impressed for the step up that represented. The aircraft was highly praised for its heavy armament, structural strength, maneouvrability, bombing accuracy and high performance but there was, however one complain: the fuselage was narrow and the crews generally complained about the cramped conditions they had to flight in. Due to that narrowness, it was almost impossible to switch positions during-flight if wounded and, furthermore, due to internal structure, both pilot and observer were separated from the wireless operator and the rear gunner, something that was common for the light bombers of the era like the Douglas A-20 or the Handley Page Hampden.
It started its combat career in North Africa just in time to stop Rommel's advance, where it suffered heavy losses when it was used as a low level attack because it went unescorted due to the chaos of the desert war. On the contrary, when operating at medium altitude, with a fighter escort, it had a very low loss rate.
The Mk.III version was an improved Mk.II which had defensive armament increased to 14 machine guns and a dorsal turret designed by Boulton Paul with four 0.30in Browning machine guns. 250 of them were built. It served with the Royal Australian Air Force, briefly with the Royal Canadian Air Force, with the South African Air Force and the Royal Air Force, however we could only find pics for the RAF users.
The Mk.IIIa was a development of the Mk.III that was ordered by the United States Army Air Force to be lend leased to the Royal Air Force. It featured a newly built and designed electrically powered turret with two 0.50in machine guns. Two-hundred and eighty one of them were built and it only served with the RAF.

Sources:
1. https://en.wikipedia.org/wiki/Martin_Baltimore
2. http://www.militaryfactory.com/aircraft/detail.asp?aircraft_id=264