43rd Regiment

• 43rd (Monmouthshire) Regiment of Foot
• 43rd Air Defense Artillery Regiment
• 43rd Battalion (disambiguation)
• 43rd Bomber Aviation Regiment
• 43rd Brigade (disambiguation)
• 43rd Division (disambiguation)
• 43rd Erinpura Regiment
• 43rd Georgia Volunteer Infantry
• 43rd Group (disambiguation)
• 43rd Illinois Volunteer Infantry Regiment
• 43rd Indiana Infantry Regiment
• 43rd Infantry Regiment (France)
• 43rd Infantry Regiment (Philippine Commonwealth Army)
• 43rd Infantry Regiment (United States)
• 43rd Mississippi Infantry
• 43rd New York Volunteer Infantry Regiment
• 43rd North Carolina Infantry
• 43rd Ohio Infantry
• 43rd Regiment Massachusetts Volunteer Infantry
• 43rd Royal Tank Regiment
• 43rd Squadron (disambiguation)
• 43rd United States Colored Infantry
• 43rd Wisconsin Volunteer Infantry Regiment
• Yugoslav Air Force