Don Isidro, delivered in 1939, was the second and larger of two Krupp built motor ships of De La Rama Steamship Company, Iloilo, Philippines in inter-island service. The ship under a time charter by the United States Army as a transport during the Japanese invasion of the Philippines. As defending forces became cut off from supply by the Japanese blockade "Don Isidro" was one of eight ships, only three of which were successful, known to make an attempt to run the blockade. In that attempt, under her captain Rafael J. Cisneros, "Don Isidro" became involved in the 19 February Japanese attack on Darwin, Australia where, though not in the port, she was strafed, bombed and left off Bathurst Island burning with all lifeboats destroyed. The captain attempted to make land when she grounded about three miles off Melville Island to which survivors swam. Of the sixty-seven crew and sixteen soldiers aboard eleven of the crew and one soldier were killed or missing. Survivors were rescued by HMAS "Warrnambool", taken to Darwin, treated at the hospital and then awaited orders at the 147th Field Artillery camp.