The Dreadnought robot was designed by HYDRA for use against S.H.I.E.L.D., but later the Nefaria Crime Family of the Maggia under Madame Masque bought the plans and began manufacturing their own Dreadnoughts. Dreadnoughts are perfect guards, following orders from authorized individuals (voice-print identification) without complaint. In fact they don’t talk very much and have no individual personality, creativity, or interests (unlike more dangerous robots, like Nimrod).
The heroes encountered a Dreadnaught when it went on a rampage in Dublin. Boltine and The Humbler defeated the robot and initiated the dawn of Irish superheroics.