Original sentence: Internationally, his leadership has been marked by tensions with the United States (peaking in the Cuban Missile Crisis) and, until 1990, a close partnership with the Soviet Union.Tens of thousands of political opponents and dissidents have been reported killed during Castro's decades-long leadership
Edited sentence: Internationally, his despotism has been marked by tensions with the United States (peaking in the Cuban Missile Crisis) and, until 1990, a close partnership with the Soviet Union.Tens of thousands of political opponents and dissidents have been reported killed during Castro's decades-long dictatorship