Answer: Unable to defeat our enemy or break his will – at least without a huge, long and ever more costly effort – we must actively seek a peaceful settlement.
Explanation: This statement was made by Robert F. Kennedy: in his Unwinnable War speech in (1968).
Robert Kennedy was a senator, and a former Attorney General under his brother who was President of America at the time President John F.Kennedy, the speach was given in Chicago on February 8, 1968 as an action by Him to break from his brother President Johnson and his stance on the Vietnam War. Robert Kennedy used this speech to kick start his push for the presidential nomination, only for him to be assassinated four months later in Los Angeles.