Why did the U.S. send troops into Haiti and the Dominican republic during the early 1900s?

The U.S. sent troops into Haiti and the Dominican Republic during the early 1900s primarily to stabilize the region and protect American economic interests. In Haiti, U.S. military intervention in 1915 followed political instability and the threat of German influence, while in the Dominican Republic, troops were dispatched in 1916 to address similar concerns over political chaos and financial instability. The interventions were part of a broader strategy known as the Roosevelt Corollary to the Monroe Doctrine, aimed at preventing European intervention in Latin America.