Executive Order 13769, officially titled 'Protecting the Nation from Foreign Terrorist Entry into the United States,' was a presidential executive order issued by President Donald Trump on January 27, 2017, shortly after his inauguration. Commonly referred to as the 'Muslim ban,' 'Trump travel ban,' or simply the 'Muslim Ban,' it imposed travel restrictions by temporarily suspending the entry of immigrants and certain travelers from seven predominantly Muslim countries—Iran, Iraq, Libya, Somalia, Sudan, Syria, and Yemen—for 90 days, while also halting the U.S. Refugee Admissions Program for 120 days and indefinitely barring Syrian refugees. The order aimed to enhance national security through additional vetting but faced immediate widespread criticism for discriminating against Muslims and violating constitutional rights. It was implemented abruptly, causing chaos at airports and detentions of travelers, and was subject to multiple legal challenges and court-issued restraining orders that blocked its enforcement. Critics, including civil rights organizations, argued it was motivated by religious animus, citing Trump's campaign statements, while supporters viewed it as a necessary security measure. On March 6, 2017, it was superseded by Executive Order 13780, a revised version that removed Iraq from the list. The original order's effects were limited due to court interventions, but it set the stage for ongoing debates on immigration policy and executive authority. Ultimately, the Supreme Court upheld a third iteration in 2018, and the order remains a pivotal example of controversial executive action in modern U.S. history, influencing subsequent travel restrictions and highlighting tensions between national security and civil liberties.