The 4th Infantry Brigade was a formation of the New Zealand Military Forces, active in both the First and Second World Wars. It was initially raised in England in 1917 for service with the New Zealand Division on the Western Front during the First World War. It only fought in one major engagement, the Battle of Broodseinde, although it was in reserve for two other significant battles, the Battle of Messines and the First Battle of Passchendaele. The brigade was disbanded in early 1918 due to a reorganisation of the New Zealand Division.

The New Zealand Division was an infantry division of the New Zealand Expeditionary Force raised for service in the First World War. It was formed in Egypt in early 1916 when the New Zealand and Australian Division was renamed after the detachment of its Australian personnel left the New Zealand Infantry Brigade, together with reinforcements from New Zealand, as the basis of the division. It was commanded by Major General Andrew Hamilton Russell for the duration of the war.