Answer:
He promised to end the Vietnam War.
Step-by-step explanation:
On January 23, 1973, he coined "Peace with Honor" a famous phrase, for US candidate for presidency in spirit of the Paris Peace Accord that ended Vietnam War.
The phrase comes from a promise while in campaign made in 1968: "I pledge to you that we shall have an honorable end to the war in Vietnam."
Nixon ran on a campaign with a strong duty to restore law and order to the polarized atmosphere among US cities and provide new leadership seeking the withdrawing of troops from Vietnam .
The new presidency departed from Democratic President Lyndon B. Johnson.