Carl Johan Cronstedt was a Swedish military officer and politician born on March 24, 1743. He is best known for his role in the Finnish War, where he served as a commander. Cronstedt's leadership was significant during the conflict, particularly in the defense of the city of Helsinki against Russian forces. In addition to his military career, Cronstedt was involved in politics and held various administrative positions. He was a member of the Swedish Parliament and contributed to discussions on military and national defense issues. Cronstedt passed away on December 18, 1820, leaving a legacy in both military and political spheres.