| Maharaja Sajjan Singh was from the Rathore Dynasty and ruled the princely State of Ratlam, now a district in Madhya Pradesh. |
| He became the Ratlam throne successor at the age of 13 as his parents' only son. |
| In 1908, he was appointed Captain in the British Indian Army. |
| During 1914-1915, he served the Western front in World War I and received 11 to 13-gun salutes for his loyalty. |
| Post World War I, he ruled Rewa State from 1918 to 1922. |
| From 1915 to 1936, he served as aide-de-camp to General George V and Prince of Wales. |
| From 1936 to 1947, he was an honorary aide-de-camp to George VI. |
| He had a passion for Polo and held roles in Indian Polo Association and Army Polo Team Selection Committee. |
| He had five children with his fifth wife, Sodawala Maharani Shrimant Sodha Bai Sahiba, whom he married along with four others. |
| He served as Vice-President of Central India Rajput Hitkarini Sabha. |
| He received honors like Delhi Durbar Gold Medals (1903, 1911), Victory Medal (1918), and the Legion of Honour of France (1918), among others. |
| In 2018, the film "Sajjan Singh Rangroot" loosely based on his life, starred Diljit Dosanjh as Sajjan Singh. |
