He became major in 1787, visited England in 1789, and purchased a lieutenant-colonelcy in 1790, returning to India in the following year.
Promotion followed in 1749 to a majority, and in 1750 to the lieutenant-colonelcy of the loth, with which he served in Scotland.
The few and miserable triumphs of Sweden during the Seven Years' War were due almost entirely to young Sprengtporten, and he emerged from it with a lieutenant-colonelcy, a pension of X20, and the reputation of being the smartest officer in the service.
A year previously he had been promoted to a lieutenant-colonelcy.
