 Complete the following phrase:  The 2nd Light Horse arrived in Cairo, Egypt, in January 1915 and took part in the ill-fated invasion of the Gallipoli Peninsula in Turkey in late April of that year. The Light Horse served at Gallipoli in a dismounted role, the terrain at AnzacAri Burnu being poorly suited to cavalry manoeuvres. At Gallipoli, the 2nd Light Horse were charged with the defence of Quinns Post in Monash Valley, vulnerable to Turkish positions which looked directly over it. They were amongst the units required to hold the post under the brunt of a major Turkish counteroffensive on 19 May. On 7 August, as part of the now famous Allied August Offensive, men of the 2nd Light Horse led a feint attack from Quinns Post, charging the Turkish line and suffering heavy casualties, to coincide with the tragic charge of the 3rd and 1st Light Horse at 