the regiment in succession to his brother, who became its Honorary Colonel the following year. Territorial Force The Imperial Yeomanry were subsumed into the new Territorial Force (TF) under the Haldane Reforms of 1908. and the regiment was officially titled the Montgomeryshire Yeomanry (Dragoons) with the following organisation: RHQ at Brook Street, Welshpool A Squadron at Llanfyllin, with detachments at Meifod, Llanrhaeadr-ym-Mochnant, Llanfihangel-yng-Ngwynfa, Llangedwyn, Trefonen, Llanfair Caereinion, and Llansantffraid-ym-Mechain B Squadron at Welshpool, with detachments at Guilsfield, Castle Caereinion, Four Crosses, Chirbury, Berriew, Trewern and Forden C Squadron at Newtown, with detachments at Church Stoke, Caersws, New MiIls, Llanbrynmair, Montgomery, Trefeglwys, Bettws Cedewain, Cemmaes Road, Dolfor and Llangurig D Squadron at Llandrindod Wells, with detachments at Llanidloes, Builth Wells, Ryhayader, Llanbister, Bowling Green Lane, Knighton and Hay-on-Wye The regiment formed part of the TF's South Wales Mounted Brigade (SWMB), based at Carmarthen. World War I Mobilisation When war was declared on 4 August 1914, the Montgomeryshire Yeomanry mobilised at Brook Street Drill Hall with Brevet Colonel Robert Williams-Wynn, DSO, in command. It joined the SWMB at Carmarthen and then went with it by train to Hereford. In accordance with the Territorial and Reserve Forces Act 1907 (7 Edw. 7, c.9) which brought the TF into being, it was intended to be a home defence force for service during wartime and members could not be compelled to serve outside the country. However, on 10 August 1914 the TF was invited to volunteer for overseas service. In the SWMB the Montgomeryshire and Glamorgan Yeomanry signed up en masse at Hereford, though the Pembroke Yeomanrywere less enthusiastic. On 15 August the War Office issued instructions to separate those men who had signed up for Home Service only, and form these into reserve units. On 31 August, the formation of a reserve or 2nd Line unit was authorised for each 1st Line unit where 60 per cent or more of the men had volunteered for Overseas Service. The titles of these 2nd Line units would be the same as the original, but distinguished by a '2/' prefix. In this way duplicate battalions, brigades and divisions were created, mirroring those TF formations being sent overseas. Later, the 2nd Line was prepared for overseas service and a 3rd Line was formed to act as a reserve, providing trained replacements for the 1st and 2nd Line regiments. 1/1st Montgomeryshire Yeomanry The 1/1st Montgomeryshire Yeomanry moved with the