Sworn into office on February 27, 1963, he tried to implement a number of social reforms, which caused the anger of the business magnates and members of the army, who initiated a rumor campaign that accused Bosch of being a communist.

[8] On April 24, 1965, three junior officers requested a meeting with President Donald Reid Cabral, who rejected the offer after he had received news of a suspected anti-government plot.

Several hours later, four Loyalist P-51 Mustangs conducted aerial bombings of the National Palace and other Constitutionalist positions, and one plane was shot down by ground machine-gun fire during the incident.

The majority of the DRP leadership fled the capital, and Constitutionalists mobilized a total of 5,000 armed civilians and 1,500 members of the military.

[8][9] On April 26, José Rafael Molina Ureña was declared the provisional president, and large crowds gathered in the streets to demand Bosch's return from exile.

Later that day, 1,500 Loyalist troops, supported by armored cars and tanks, marched from the San Isidro Air Base, captured Duarte Bridge, and took position on the west bank of the Ozama River.

One U.S. Marine Corps battalion landed in Haina and later moved to Hotel Embajador, where it provided assistance in the upcoming airlifts.

[8][9][11] It was the first overt U.S. military intervention in Latin America in more than 30 years, although it came on the heels of U.S.-backed coups in Guatemala and Brazil, as well as ongoing covert operations in Cuba.

[12] At 2:16 a.m. on April 30, 1965, the 3rd Brigade of the 82nd Airborne Division landed at the San Isidro Air Base and started the U.S. military intervention in the conflict.

At sunrise the 1st Battalion, 508th Infantry Regiment moved up the San Isidoro highway under the cover of F-4 Phantom jets flying from Puerto Rico, securing a position east of the Duarte bridge.

[9][13] On May 5, the OAS Peace Committee arrived in Santo Domingo, and a second definite ceasefire agreement was signed, which ended the main phase of the civil war.

Under the Act of Santo Domingo, the OAS was tasked with overseeing the implementation of the peace deal as well as distributing food and medication through the capital.

A day later, OAS members established the Inter-American Peace Force (IAPF) with the goal of serving as a peacekeeping formation in the Dominican Republic.

Utilizing Radio Santo Domingo as their primary weapon, the rebels launched a psychological campaign against the United States, the OAS, and the Loyalists.

Additionally, a reinforced company from the army's 7th Special Forces Group, led by Col. Edward Mayer, attacked critical relay sites beyond the capital.

One of the planes accidentally strafed U.S. troops, prompting the Americans to return fire and shoot down another P-51 of World War II vintage.

The first postwar elections were held on July 1, 1966, and pitted the conservative Reformist Party candidate, Joaquín Balaguer, against the former president Juan Emilio Bosch Gaviño.