In February 1918, due to the heavy losses that had been sustained, the 8th/9th and 10th Dublins were disbanded and its men were transferred to the 1st and 2nd Dublins. On 21 March the Regiment was on the defensive during the Battle of St. Quentin when the Germans began an immense bombardment as part of their last-gasp major offensive known as Operation Michael against British and Empire forces in the Picardy area. The 1st and 2nd Dublins suffered heavily from the intense bombardment (which included poison gas) and when the Germans attacked shortly afterwards, the Germans broke through the shattered remnants. The Germans made significant gains but their offensive gradually lost momentum and the Germans were pushed back by April. During that month, on 14 April, the 1st and 2nd Dublins had to briefly amalgamate due to the losses it had sustained during the German offensive, forming the 1st/2nd Dublins. The 1st Battalion was reconstituted a few days later with drafts from the 2nd Battalion, which was reduced to cadre strength. On 26 April the 1st Dublins left the 16th (Irish) and rejoined the 86th Brigade, 29th Division. In June the 2nd Dublins transferred to the 31st Division and was reconstituted. It was transferred to the Lines of Communication (LoC) before moving to 50th Division in July. In August the Allies launched their counter-offensive against the Germans and eventually reached the Hindenburg Line. The Allies launched their offensive against the Line in September, and the 1st, 2nd, and 7th Dublins, took part in the battles of the St Quentin Canal, Cambrai and Beaurevoir, and the Hindenburg Line was successfully breached by the Allies. The Dublins took part in the last offensives of the war, taking part in, among others, the Fourth Battle of Ypres, Battle of Courtrai and the Battle of the Selle during September and October. The 1st Dublins lost their commanding officer, Lieutenant Colonel Athelstan Moore, on 14 October. The Regiment's last major battle was in the Battle of the Sambre on 4 November. The war ended on the Western Front with the Armistice on 11 November 1918.