USS Bancroft (DD-256)
Trans-Atlantic convoys escorted

Convoy
Escort Group
Dates
Notes
SC 49
-
14-21 Oct 1941
Newfoundland to Iceland
SC 55
-
19-25 Nov 1941
Newfoundland to Iceland
SC 71
-
27 Feb-9 March 1942
Newfoundland to Northern Ireland
ON 76
-
16–23 March 1942
Northern Ireland to Newfoundland
SC 78
-
9–16 April 1942
Newfoundland to Northern Ireland
ON 90
-
5–9 May 1942
Northern Ireland to Newfoundland
SC 85
MOEF group C4
31 May-12 June 1942
Newfoundland to Northern Ireland
ON 105
MOEF group C4
20–27 June 1942
Northern Ireland to Newfoundland
HX 197
MOEF group C4
9–16 July 1942
Newfoundland to Northern Ireland
ON 116
MOEF group C4
26 July-1 Aug 1942
Northern Ireland to Newfoundland
ON 121
MOEF group C3
20-22 Aug 1942
Iceland to Newfoundland
SC 99
MOEF group C1
9-19 Sept 1942
Newfoundland to Northern Ireland
ON 147
MOEF group C4
20-23 Nov 1942
Northern Ireland to Newfoundland
ON 146
MOEF group B3
29 Nov-5 Dec 1942
Northern Ireland to Newfoundland
SC 127
WLEF
16–20 April 1943
Halifax to Newfoundland
ONS 4
WLEF
29 April-5 May 1943
Newfoundland to Halifax
HX 240
WLEF
21–25 May 1943
Halifax to Newfoundland
HX 242
MOEF group C2
6–14 June 1943
Newfoundland to Northern Ireland
ON 190
MOEF group C2
25 June-1 July 1943
Northern Ireland to Newfoundland
ONS 19
9th escort group
27 Sept-9 Oct 1943
-

Question: Which convoys did the USS Bancroft use to escort MOEF group C3, group C1, and  group C4?
Answer: The USS Bancroft escorted convoy ON-121 with Escort Group C-3, convoy SC-99 with Escort Group C-1 and convoy ON-147 with Escort Group C-4.