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{{Infobox officeholderofficeholder|name= Claude Berwick Duval, I
|office==[[Louisiana]] State Senator for Terrebonne and St. Mary parishes
|term_start=1968
Anthony Guarisco, Jr.
|birth_date=October 24, 1914
|birth_place=Houma, Terrebonne Parish<br> [[Louisiana]], [[United States|USA]]
|death_date=March 3, 1986 (aged 71)
|resting_place=Magnolia Cemetery in Houma
}}
'''Claude Berwick Duval, I''' (October 24, 1914 – March 3, 1986), was an attorney from his native Houma, [[Louisiana]],who from 1968 to 1980 was a [[Democratic Party|Democratc]] state senator for Terrebonne and St. Mary parishes, having served from 1968 to 1980. He is best known for his profound oratory, his accommodation of Senate colleagues, his unsuccessful 1963-1964 campaign for lieutenant governor, and his opposition to the national holiday on the third Monday of January which honors [[civil rights]] activist [[Martin Luther King, Jr.]]
==Background==
Duval was born to Stanwood Duval (1868–1928), and the former Mamie Richardson. Claude Duval and his older brother, Stanwood Richardson Duval, Sr., attended the [[United States Marine Corps]] reserve officers training school in Quantico, [[Virginia]], where they were jointly commissioned on October 31, 1942, as second lieutenants. The brothers served during [[World War II]] with the First and Third battalions, 23rd Marine Regiment of the 4th Marine Division. They landed in the assault waves in the seizure and capture of the [[Pacific]] islands of [[Saipan]], Tinian, and [[Iwo Jima]]. Stanwood Duval wrote a memoir of his war experiences, which he dedicated to the 3,298 officers and enlisted men of the 4th Marine Division who lost their lives in the fighting.