'Wyvern' was a British unrealised plan by General Sir Bernard Montgomery’s Allied 21^st Army Group for an attack by Lieutenant General B. G. Horrocks’s XXX Corps of Lieutenant General Sir Miles Dempsey’s 2^nd Army as the first stage of an offensive between the lines of the Meuse/Maas and Rhine rivers (autumn 1944).

The offensive was in fact undertaken in February and March 1945 as 'Veritable' by formations of General H. D. G. Crerar’s Canadian 1^st Army.