Section: Eight to ten men commanded by a Corporal.
Platoon: Four Sections commanded by a Lieutenant.
Company: Four Platoons, 200 men commanded by a Major.
Battalion: Four Companies, 1000 men commanded by a Lieutenant Colonel or Colonel.
Brigade: Four Battalions, 4000 men commanded by a Brigadier or Brigadier General.
Division: Three Brigades commanded by a Major General.
Corps: Three or four Divisions commanded by a Lieutenant General.
Army: Four Corps commanded by a General.
The Australian Light Horse was organised into regiments and brigade. A Regiment was the rough equivalent of a battalion except that its strength was closer to 500 men than 1000.
The Turkish Army at Gallipoli consisted of regiments rather than brigades. A division usually consisted of three regiments, each of three infantry battalions, plus artillery.
British and Turkish positions.