President Trump did not define a clear path out of the conflict, which he estimated would end within three weeks.
The president made his case for the U.S. attack, and said that the main objectives had been achieved.
The United States and Israel have done significant damage to Iran’s military capabilities. But Iran still fires missiles, has nuclear material and coordinates with militias in the region.
Any decision by Iran to keep fighting would complicate President Trump’s stated goal of trying to end the war within weeks.
The letter, by President Masoud Pezeshkian of Iran, was at times defiant, patronizing or conciliatory, and came hours before President Trump was set to address the American people on the war.
The slow-moving A-10 “Warthog” is a so-called close-air support plane that could be used to help U.S. ground forces seize territory near the Strait of Hormuz.
President Trump’s statement was the second time in 24 hours that he had declared that the nuclear problem with Iran had been solved, despite all evidence to the contrary.
For the second time in recent days, President Trump declared that one of the key objectives of the war had been accomplished.
The White House said the president would address the nation about Iran on Wednesday evening.