What led to end of operation Iraq freedom?

Operation Iraqi Freedom officially ended in December 2011, primarily due to the U.S. government's decision to shift focus towards nation-building and stability in Iraq, alongside a growing domestic demand for the withdrawal of American troops. The political situation in Iraq had evolved, with the Iraqi government taking more control, and the U.S. aimed to promote a sovereign and self-reliant Iraqi state. Additionally, declining public support for the war and the desire to redirect military resources contributed to the decision to conclude the operation.