The Action on the Polderhoek Spur (3 December 1917), was a local operation in the Ypres Salient, by the British Fourth Army (renamed from the Second Army on 8 November) against the German 4th Army during the Third Battle of Ypres in Belgium during the First World War. Two battalions of the 2nd New Zealand Brigade of the New Zealand Division attacked the low ridge from which German observers could view the ground from Cameron Covert to the north and the Menin road to the south-west. A New Zealand advance of 600 yd (550 m) on a 400 yd (370 m) front, would shield the area north of the Reutelbeek stream from German observers on the Gheluvelt spur further south.