The history of the Indian Medical Service (IMS) dates back to 1612 when, on the formation of the East India Company, the Company appointed John Woodall as their first Surgeon General.
On BBC 1's Who Do You Think You Are?, broadcast in August 2010, it was revealed that Penry-Jones's maternal grandfather, William, had served with the Indian Army Medical Corps at the Battle of Monte Cassino and that his earlier ancestors had a long-standing connection with the Indian Army.
Her father is a retired doctor serving with the Army Medical Corps, whereas her mother too was associated with the Army.
In 1860, an Anglo-French force gathered at Hong Kong and then carried out a landing at Pei Tang on August 1, and a successful assault on the Taku Forts on August 21 after which Hospital Apprentice Andrew Fitzgibbon of the Indian Medical Establishment became the youngest recipient of the Victoria Cross at the age of 15 years and 3 months.
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Major Laishram Jyotin Singh was an army doctor in the Indian Army Medical Corps, who died fighting a suicide bomber during the attack on the Indian Embassy in Kabul.