The Commander-in-Chief of India, Lord Kitchener carried out a reform of the British Indian Army in 1903. These reforms were intended to improve the Army, which had been formed from the separate Bengal, Bombay and Madras presidency armies in 1895 to be replaced by the Bengal, Bombay, Madras and Punjab commands. The localisation of regiments was abolished, and in future every regiment was to have the opportunity of experiencing service on the Frontier. A new method of numbering and designating regiments was introduced. The renumbering went as follows: Bengal regiments retained their existing numbers. Punjab regiments, less the 5th Gurkhas, were numbered consecutively, adding 50, so that, for example, the 4th Sikh Infantry and the 1st Punjab Infantry became 54th and 55th. The Guides remained unnumbered. Madras regiments added 60 and, since over the years a number of them had been increasingly recruited in the Punjab, this was recognised in their titles, the 30th Madras, for example, becoming the 90th Punjabis. The Hyderabad Contingent regiments were brought into the Line as 94th to 99th. The Bombay regiments added 100, so that the 1st Bombay Grenadiers became the 101st Grenadiers, and so on.

By 1903, the total strength of the Indian Army was 240,000 men. They served in 39 cavalry regiments, 135 infantry battalions (including 17 Gurkha), a joint cavalry-infantry unit the Corps of Guides, three sapper regiments and 12 mountain artillery batteries. In addition to the regular Indian Army, the armies of the Princely states, and regiments of the Auxiliary force (European volunteers) could also be called on to assist in an emergency. The Princely states had 22,613 men in 20 cavalry regiments and 14 infantry battalions. The Auxiliary force could field another 40,000 men in 11 regiments of horse and 42 volunteer infantry battalions. Also available were the Frontier Militia and the Military Police, which could field 34,000 men between them.

List of regiments of the Indian Army (1903)

Cavalry

Bodyguard troops

Governor-General's Bodyguard

Governor's Bodyguard, Madras

Governor's Bodyguard, Bombay

Former Bengal Regiments

1st Duke of York's Own Lancers (Skinner's Horse) 2nd Lancers (Gardner's Horse) 3rd Skinner's Horse 4th Lancers - (4th Cavalry in 1904) 5th Cavalry 6th Prince of Wales's Cavalry - (6th King Edward's Own Cavalry in 1906) 7th Lancers - (7th Hariana Lancers in 1904) 8th Lancers - (8th Cavalry in 1904) 9th Hodson's Horse 10th Duke of Cambridge's Own Lancers (Hodson's Horse) 11th Prince of Wales's Own Lancers - (11th Prince of Wales's Own Lancers (Probyn's Horse) in 1904) 12th Cavalry 13th Duke of Connaught's Own Lancers (Watson's Horse) 14th Murray's Jat Lancers 15th Lancers (Cureton's Multanis) 16th Cavalry 17th Cavalry 18th Tiwana Lancers 19th Lancers (Fane's Horse)

List of regiments of the Indian Army (1903)

Former Punjab Regiments

21st Prince Albert Victor's Own Cavalry (Frontier Force) - (21st Prince Albert Victor's Own Cavalry (Frontier Force) (Daly's Horse) in 1904) 22nd Cavalry (Frontier Force) - (22nd Sam Browne's Cavalry (Frontier Force) in 1904) 23rd Cavalry (Frontier Force) 25th Cavalry (Frontier Force)

List of regiments of the Indian Army (1903)

Former Madras regiments

26th Light Cavalry

27th Light Cavalry

28th Light Cavalry

Former Hyderabad regiments

20th Deccan Horse

29th Lancers (Deccan Horse) 30th Lancers (Gordon's Horse)

Former Bombay regiments

31st Duke of Connaught's Own Lancers

32nd Lancers

33rd Queen's Own Light Cavalry

34th Prince Albert Victor's Own Poona Horse

35th Scinde Horse

36th Jacob's Horse

37th Lancers (Baluch Horse)

Former Local Corps

38th Central India Horse

39th central horse

Cavalry and Infantry

Queen's Own Corps of Guides

Infantry

Former Thiyyar Regiments

Thiyyar Regiment

Former Bengal Regiments

1st Brahmans

2nd (Queen's Own) Regiment of Rajput Light Infantry

3rd Brahmans

4th Prince Albert Victor's Rajputs

5th Light Infantry

6th Jat Light Infantry

7th (Duke of Connaught's Own) Rajputs

8th Rajputs

9th Bhopal Infantry - former Local Corps

10th Jats

11th Rajputs

12th Pioneers (The Kelat-i-Ghilzie Regiment) 13th Rajputs (The Shekhawati Regiment) 14th Ferozepore Sikhs 15th Ludhiana Sikhs 16th Rajputs (The Lucknow Regiment) 17th Infantry (The Loyal Regiment) 18th Infantry 19th Punjabis 20th Duke of Cambridge's Own Punjabis - (20th Duke of Cambridge's Own Infantry (Brownlow's Punjabis) in 1904) 21st Punjabis 22nd Punjabis 23rd Sikh Pioneers