Final answer:
President Johnson announced a partial bombing halt over North Vietnam and that he would not seek another term in the 1968 election.
Step-by-step explanation:
On March 31, 1968, during a pivotal television address, President Lyndon B. Johnson made two major announcements that left an indelible mark on American history. Firstly, he declared a partial bombing halt over North Vietnam, signaling a shift in the U.S. policy towards pursuing a peaceful resolution to the Vietnam War. Secondly, in a surprising move, President Johnson stated that he would neither seek nor accept another term as president, stepping away from the upcoming election. Johnson's decisions were influenced by a combination of factors, including widespread anti-war sentiment, divisions within the Democratic Party, and a desire to remove the presidency from the internal divisions the war was causing.