The Lachmann Sub in Warzone and Modern Warfare 3 is an SMG returning from the previous game and one commonly known by players as the MP5. The Lachmann Sub - or MP5 - is available to acquire, use, and customise in Modern Warfare 3 as part of the new Carry Forward system introduced with the release of the game.

The term "submachine gun" was coined by John T. Thompson, the inventor of the Thompson submachine gun, to describe its design concept as an automatic firearm with notably less firepower than a machine gun (hence the prefix "sub-").

After the capitulation of Pernambuco in 1654, the Dutch handed over this fortress to the Portuguese, who renamed it Fortaleza da Nossa Senhora de Assuno ("Fort of Our Lady of the Assumption"), after which the city of Fortaleza takes its name.

Etymology. From Provenal and Old Occitan fortalessa, from Late Latin fortalitia ( fortress ), from Latin fortis ( strong ).