18th Brigade

• 18 Squadron (disambiguation)
• 18th (Croatian) Eastern Bosnian Brigade
• 18th Army (disambiguation)
• 18th Aviation Brigade (United States)
• 18th Battalion (disambiguation)
• 18th Brigade (Australia)
• 18th Brigade Royal Field Artillery
• 18th Division (disambiguation)
• 18th Engineer Brigade (United States)
• 18th Fires Brigade (United States)
• 18th Infantry Brigade (United Kingdom)
• 18th Military Police Brigade (United States)
• 18th Mounted Brigade (United Kingdom)
• 18th Regiment (disambiguation)
• XVIII Brigade, Royal Horse Artillery (T.F.)
• XVIII Corps (disambiguation)