The 3rd Gorkha Rifles or Third Gorkha Rifles, abbreviated as 3 GR is an Indian Army infantry regiment. It was originally a Gurkha regiment of the British Indian Army formed in 1815. This regiment recruit mainly Magars and Gurung tribes. They were present at a number of actions and wars including the siege of Delhi in 1857 to the First and Second World Wars. After the Partition of India in 1947 the regiment was one of the six Gorkha regiments transferred to the Indian Army as part of the Tripartite Agreement signed between India, Nepal and Britain at the time of Indian independence. Prior to independence, the regiment was known as the 3rd Queen Alexandra's Own Gurkha Rifles. In 1950 the regiment's title was changed to 3rd Gorkha Rifles. Since 1947 the regiment has participated in a number of conflicts including the 1947 and 1971 wars against Pakistan.

The Second Anglo-Afghan War was a military conflict fought between the British Raj and the Emirate of Afghanistan from 1878 to 1880, when the latter was ruled by Sher Ali Khan of the Barakzai dynasty, the son of former Emir Dost Mohammad Khan. The war was part of the Great Game between the British and Russian empires.