[3][citation needed] VI Corps was organised within Sir Herbert Plumer's Second Army of the British Expeditionary Force on 1 June 1915.

The attack was made by the German XXVI Reserve Corps between the Roulers and Staden railways, NW of Ypres.

The attack was designed to test new weapons (the gas released was an 80:20 mixture of chlorine and phosgene) and to inflict casualties.

There was some shelling, but apart from sending out infantry and air patrols to gauge the effectiveness of the gas cloud, the Germans made no attempt to advance.

VI Corps' anti-gas measures were reasonably effective, and a pre-arranged counter-barrage of shrapnel shells discouraged the enemy patrols.

[8] In early 1916 the expanding BEF was reorganised, and VI Corps became part of Sir Edmund Allenby's Third Army in the Arras sector, with which it remained until the Armistice.

[13] Order of Battle of VI Corps August 1918[13] GOC: Lt-Gen Aylmer Haldane For the Second Battle of Bapaume (31 August – 3 September) and the subsequent Allied attacks during September 1918, VI Corps had Guards, 2nd, 3rd, and 62nd (2nd West Riding) Divisions under command.

[17] In June 1940, following the Allied defeat in the Second World War's Battle of France, the British Army proceeded to reorganise their forces throughout the UK.

Tweed spent the last five months of the war as a civilian member of the corps staff, and accompanied the troops into the Rhineland.

Although one of Tweed's studies entitled Attack was exhibited, the ambitious architectural monument that he designed for South Africa was never executed.