The Aermacchi MB-326 was an Italian jet trainer and light attack aircraft developed in the 1950s. The MB-326 was designed during the jet trainer boom, which created demand for an aircraft capable of providing both basic and combat training for pilots. Accordingly, Aermacchi designed the MB-326 to serve both as a trainer and a combat aircraft in its own right. It featured a lightweight all-metal structure for ease of use and maintenance. After the MB-326 made its first flight on 10 December 1957, the type saw success both at home and abroad in both military and civilian roles. In total, at least 800 MB-326s were produced, with Brazil being the largest operator of the type.

The MB-326B was the first ground-attack variant of the Aermacchi MB-326 jet trainer, developed at the request of the Tunisian Air Force for a light ground-attack aircraft in 1965. Compared to the initially unarmed MB-326, the MB-326B featured six underwing pylons for mounting bombs or gun pods. After tests involving converted prototypes proved successful, eight MB-326Bs were delivered to the Tunisian Air Force, with a later batch of similar specifications designated MB-326F sold to Ghana that same year.

Introduced in Update 2.53 "Line of Contact", the MB-326B is an early variant of the MB-326K ground-attack aircraft. While it shares a similarly versatile loadout, including bombs, rockets, and napalm, with its successor, it lacks any built-in guns and is powered by a considerably weaker engine. While its firepower is much weaker, the MB-326B can mount up to six miniguns and can prove deadly against any aircraft. Although the MB-326B handles quite well for a jet aircraft, the weak engine often results in the aircraft rarely reaching its top speed except during a prolonged dive. This can be further exacerbated when laden with a heavy payload. Because of this, the MB-326B may find itself lagging behind most WWII jet aircraft in terms of speed and manoeuvrability.