From 20 September to 19 October 1944 Douglas A. Munro served as escort for Vixen carrying Admiral R. E. Ingersoll, Commander-in-Chief, Atlantic Fleet on a tour of Caribbean defenses.

After exercising at Manus, she sailed to Biak, Schouten Islands, to pick up a convoy of LSTs and merchant ships bound for Lingayen Gulf, arriving there 9 February.

Upon her arrival a week later she was assigned to screen a minesweeping unit clearing the San Bernardino Strait and the approaches to Manila Bay, and also supported naval and amphibious operations on nearby shores.

Douglas A. Munro cleared Leyte 6 September to join the South China Force, arriving in the approaches to the Yangtze River on the 19th.

She served with this force until 5 January 1946 when she got underway from Hong Kong for the U.S. West Coast, arriving at San Francisco, California, 1 February.

After training until 29 October, the DE-422 was on her way to Korean waters to serve with the United Nations Blockading and Escort Force; participating in the siege and bombardment of Wonsan Harbor.

Sailing from Pearl Harbor 22 October 1955 Douglas A. Munro served in the western Pacific until 14 January 1956 when she returned to patrol the Trust Territories.

On the 27th while conducting a surveillance of the Bonins, she discovered a Japanese fishing vessel violating the 3-mile limit and placed a prize crew aboard Harakawa Maru to take her to the Commissioner for the Trust Territories.