Skip to main content
Edit entry 

Calvin C Chalker Jr


Killed on Mission (KOM). B-26B #41-31697 "Duck Butt" [TQ:R] 387BG/559BS while serving as Co-Pilot. The aircrat crashed on instrument takeoff and struck a tree while departing on mission to Boulogne, rance. Bomb load exploded. Only the Tail Gunner survived with serious injuries. No MACR issued. The 322nd was moved to the 9th AF Oct. 1943.


Units served with

  • 387th Bomb Group

    387th Bomb Group

    The 387th Bomb Group flew just under thirty missions with the Eighth Air Force before being transferred to the Ninth Air Force in October 1943. The Group remained at Chipping Ongar, Essex after being reassigned and continued to hit targets in France....

  • 559th Bomb Squadron


  • 41-31697 Duck Butt

    B-26 Marauder
    B-26B-20-MA #41-31697 "Duck Butt" [TQ:R] was assigned to the 387BG/559BS at Chipping Ongar, UK. On 9-Sep-43 it was being piloted by 1LT Elwood R. McClendon. 1LT McClendon attempted to take off with a full bomb load in dense fog on instruments. He...


  • VIII Air Support Command 55

    9 September 1943
    The coastal defenses along the French coast near Boulogne are the targets for 217 B-26s from: 322BG (54); 323BG (54); 386BG (55) and 387BG (54). These operational capacity of each of these Groups has been increased by 50%. 202 aircraft are effective on...

Associated Place

  • Chipping Ongar

    Military site : airfield
    The air base was constructed by the 831st Engineer Battalion (Aviation) in late August 1942. The 387th Bomb Group were the only American group to be based there, flying B-26 Marauders in strategic missions over France, first for the Eighth and then for...


Event Location Date
Killed on Mission (KOM) Chipping Ongar, Ongar, Essex CM5, UK 9 September 1943

Killed when the aircraft struck a tree on instrument takeoff for Boulogne, France and bomb load exploded. No burial record was located.


Date Contributor Update
14 April 2020 22:21:10 jmoore43 Changes to biography

Added a "#" to the A/C serial number in the "Summary biography" to aid clarity & consistency.

Date Contributor Update
05 June 2015 22:10:35 Lee8thbuff Changes to biography, events, place associations, aircraft associations and mission associations

Lee Cunningham 5-Jun-2015. Made connections to Place, Aircraft and Mission wihtin existing website data; Added KOM event and edited Summary Biography based on "Losses of the 8th & 8th AIr Forces", Stan Bishop & John A. Hey MBE.

Date Contributor Update
27 September 2014 18:04:59 AAM AAM ingest

Drawn from the records of the National Museum of the Mighty Eighth Air Force, Savannah, Georgia / Losses of the 8th & 9th AFs Vol. I by Bishop & Hey p. 279