The 51st (Highland) Division participated in an attack on 15 June 1915 in the Second Action of Givenchy, part of the Second Battle of Artois. The division had lost several of its original battalions to piecemeal deployment and had been brought up to strength only a month before it arrived in France, largely by the attachment of a brigade from the 55th (West Lancashire) Division. It was the first experience in assault for the two battalions that spearheaded the division's attack. They succeeded in reaching the German second line of defences, but when the regular forces on their right did not the territorials were forced to retire with heavy losses. A professionally planned and executed assault by the &lt;a href="47th%20%281/2nd%20London%29%20Division"&gt;47th (1/2nd London) Division&lt;/a&gt; was one of the few successes in the Battle of Loos on 25 September, but the 46th (North Midland) Division suffered 3,643 casualties in a failed assault against the Hohenzollern Redoubt on 13 October. To Lieutenant-General Sir Douglas Haig, commander of the First Army, the 46th Division's failure demonstrated that "some territorial units still need training and discipline".