easily conquering others. British officials sought 'martial races' accustomed to hunting, or from agricultural cultures from hilly or mountainous regions with a history of conflict. Others were excluded due to their 'ease of living' or branded as seditious agitators. The doctrine of 'martial races' postulated that the qualities that make a useful soldier are inherited and that the rest of most Indians did not have the requisite traits that would make them warriors. British general and scholar Lieutenant-General George MacMunn (1869–1952) noted in his writings "It is only necessary for a feeling to arise that it is impious and disgraceful to serve the British, for the whole of our fabric to tumble like a house of cards without a shot being fired or a sword unsheathed". To this end, it became British policy to recruit only from those tribes whom they classified as members of the 'martial races', and the practice became an integral part of the recruitment manuals for the Army in the British Raj. The British regarded the 'martial races' as valiant and strong but also intellectually inferior, lacking the initiative or leadership qualities to command large military formations. They were also regarded as politically subservient or docile to authority. For these reasons, the martial races theory did not lead to officers being recruited from them; recruitment was based on social class and loyalty to the British Raj. One source calls this a "pseudo-ethnological" construction, which was popularised by Frederick Sleigh Roberts, and created serious deficiencies in troop levels during the World Wars, compelling them to recruit from 'non-martial races'. Winston Churchill was reportedly concerned that the theory was abandoned during the war and wrote to the Commander-in-Chief, India that he must, "rely as much as possible on the martial races". Critics of the theory state that the Indian rebellion of 1857 may have played a role in reinforcing the British belief in it. During this event the troops from the Bengal Native Infantry led by sepoy Mangal Pandey mutinied against the British. Similarly, the Revolt of Rajab Ali from Chittagong also caused trouble with British forces. However, the loyal Rajputs, Jats, Pashtuns, Sikhs, Gurkhas, Kumaunis and Garhwalis did not join the mutiny, and fought on the side of the British Army. From then on, this theory was used to the hilt to accelerate recruitment from among these 'races', whilst discouraging enlistment of 'disloyal' troops and high-caste Hindus