[2] On 18 March 1908, the Nottinghamshire Royal Horse Artillery (Territorial Force) was proposed as a new unit and it was recognized by the Army Council on 31 July 1908 (and the ammunition column on the same date).

2nd Line units performed the home defence role, although in fact most of these were also posted abroad in due course.

[7] The 1st Line battery was embodied with the Nottinghamshire and Derbyshire Mounted Brigade on 4 August 1914 at the outbreak of the First World War.

In early April, the division starting leaving Avonmouth and the last elements landed at Alexandria before the end of the month.

[22] The battery served with the Imperial Mounted Division in the Sinai and Palestine Campaign as part of the Desert Column.

[26] The battery served with the Australian Mounted Division for much of the remainder of the Sinai and Palestine Campaign.

As part of the Desert Mounted Corps, the division took part in the Third Battle of Gaza (by now the battery was re-equipped with four 13 pounders),[27] in particular the Capture of Beersheba (31 October) and the Battle of Mughar Ridge (13 and 14 November), and the defence of Jerusalem against the Turkish counter-attacks (27 November – 3 December).

The next day, a strong Turkish force attacked from the direction of Jisr ed Damiye and soon the artillery was in danger.

The brigade joined the division on East Coast Defences in March 1915 and concentrated at Narborough with the battery at Scarning and Wendling.

[37] The battery was posted overseas in June 1917, arriving at Basra on 13 August when it joined CCXV Brigade, RFA (T.F.)

[43] The battery remained with the 15th Indian Division, participating in the Mesopotamian campaign, for the remainder of the war.

After the end of the war, the division was run down as units were posted away or repatriated, being disbanded in March 1919.

[44] The 15th Indian Division was formally disbanded in March 1919, and there is no further mention of the 2/1st Nottinghamshire RHA in the official histories.

In April 1919 the Third Anglo-Afghan War broke out, and British troops were inducted into various units to serve.