Who was chosen to replace robert mcnamara as secretary of defense?

Clark Clifford

he worked under Lyndon Johnson

United States Secretary of Defense (1968–1969), White House Counsel (1946–1950)
 He also worked as an important advisor  to  several presidents,Truman,Kennedy,Johnson, and John Carter.

Answer: tokugawa ieyasu (徳川家康, january 31, 1543 – june 1, 1616) was the founder and first shōgun of the tokugawa shogunate of japan, which effectively ruled japan from the battle of sekigahara in 1600 until the meiji restoration in 1868.