23rd Regiment

• 23 Engineer Regiment (Air Assault) (United Kingdom)
• 23rd Arkansas Infantry Regiment
• 23rd Connecticut Infantry Regiment
• 23rd Field Regiment, RCA
• 23rd Indiana Infantry Regiment
• 23rd Infantry Regiment (United States)
• 23rd Iowa Volunteer Infantry Regiment
• 23rd Light Dragoons
• 23rd Marching Regiment of Foreign Volunteers
• 23rd Marine Regiment (United States)
• 23rd Ohio Infantry
• 23rd Pennsylvania Infantry
• 23rd Regiment Armory
• 23rd Regiment Kentucky Volunteer Infantry
• 23rd Regiment Massachusetts Volunteer Infantry
• 23rd Regiment of Bombay Light Infantry
• 23rd Regiment of Foot
• 23rd Tennessee Infantry Regiment
• 23rd Wisconsin Volunteer Infantry Regiment