World War II

Halligan earned six bronze service stars on her Asiatic-Pacific Campaign Ribbon as follows:
1 Star MARSHALL ISLANDS OPERATION
Occupation of Kwajalein and Majuro Atolls: 31 January–8 February 1944.
Attack on Eniwetok Atoll: 24–26 February 1944.
1 Star MARIANAS OPERATION
Capture and occupation of Saipan: 22 June–1 July.
1 Star LEYTE OPERATION
Leyte landings: 20 October 1944.
1 Star LUZON OPERATION
Lingayen Gulf landing: 4–18 January 1945.
1 Star IWO JIMA OPERATION
Assault and occupation of Iwo Jima: 16 February–11 March 1945.
1 Star OKINAWA OPERATION
Assault and occupation of Okinawa: 5 March–26 March 1945.