Lieutenant general (Lt Gen, LTG and similar) is a military rank used in many countries.
The rank traces its origins to the Middle Ages, where the title of lieutenant general was held by the second-in-command on the battlefield, who was normally subordinate to a captain general.
In the United States, a lieutenant general has a three star insignia and commands an army corps, typically made up of three army divisions, and consisting of around 60,000 to 70,000 soldiers.
Several countries (e.g. Balkan states) use the rank of lieutenant colonel general instead of lieutenant general, in an attempt to solve this apparent anomaly.
In addition, some countries use the lieutenant general as the rank of divisional commander, and some have designated them with French revolutionary system.