Washington: The United States is recognizing the Republic of South Sudan, the world`s newest nation, as a sovereign and independent state.
President Barack Obama says the achievement is a tribute to the generations of southern Sudanese who "struggled for this day."
South Sudan became an independent nation on Saturday. Millions of people died in the civil wars that spanned more than 50 years as the black African tribes from the south battled the mainly Arab north for independence. The warring sides reached a peace deal in 2005.
Secretary of State Hillary Rodham Clinton said in a statement that the US will remain a "steadfast partner" as South Sudan seeks to build a free, democratic and inclusive society.