The United States imposes sanctions against the Mostazafan Foundation, a foundation controlled by Supreme Leader Ali Khamenei, over alleged human rights abuses.
Iran says that it will return to the Joint Comprehensive Plan of Action, better known as the "Iran Deal", if President-elect Joe Biden lifts sanctions imposed by President Donald Trump.
The U.S. Department of the Treasury says it has blacklisted Iraj Masjedi, the Iranian Ambassador to Iraq, saying he has overseen the training and support of Shia militia groups, which are responsible for attacks on U.S. and coalition forces in Iraq.
The United States Treasury Secretary imposes fresh sanctions on Iran, blacklisting 20 Iran- and Iraq-linked companies and individuals.
Iran's Islamic Consultative Assembly formally designates the United States Department of Defense as a "terrorist organization" in response to the assassination of General Qasem Soleimani in a targeted killing in Baghdad, Iraq. Under the newly adopted bill, all United States Armed Forces personnel and Pentagon employees are "considered terrorists."
Trump administration officials say that President Donald Trump ordered the United States Armed Forces to conduct military strikes against targets of the Armed Forces of the Islamic Republic of Iran in retaliation for downing an American surveillance drone the day prior, and that he changed his mind hours later and ordered an immediate stop to the operation while American warplanes were in the air and warships were in position.
U.S. Secretary of State Mike Pompeo says the U.S. will impose "the strongest sanctions in history" on Iran if it does not meet various demands, including ending its nuclear program and leaving the Syrian Civil War.
Iranian President Hassan Rouhani rejects Pompeo's demands, and Iranian Foreign Minister Mohammed Javad Zarif accuses the U.S. of "repeating past mistakes."
Iran's Ministry of Foreign Affairs says the January 12 U.S. sanctions on Chief Justice Sadeq Amoli-Larijani are "beyond all [...] red lines."