Did the US Gain the Dominican Republic?

No. The United States never annexed or gained sovereignty over the Dominican Republic.

• 1870: Grant administration attempted annexation treaty; rejected by US Senate.
• 1916–1924: US military occupation (customs control, stability); ended with elected government.
• 1965–1966: Second US intervention (Operation Power Pack) during civil war; OAS peacekeeping followed.
• Present: DR is a fully independent nation since 1844 (from Haiti) and 1865 (from Spain). Close US ties (trade, migration, security), but sovereign.

Confusion may stem from Puerto Rico (US territory since 1898) or the 1916–24 occupation.