Question: On what date did the breakout that Hajime Toyoshima helped instigate occur?

Context paragraphs:
Hajime Toyoshima: Sergeant Hajime Toyoshima (豊嶋一 , Toyoshima Hajime ) (died August 5, 1944) was a Japanese airman in World War II.  His A6M Zero was the first of that type (after those recovered after the Attack on Pearl Harbor) to be recovered relatively intact on Allied territory when he crash landed on Melville Island, Northern Territory, Australia.  Toyoshima was the first Japanese Prisoner of War to be captured in Australia.  While a Prisoner of War, Toyoshima was one of the instigators of the Breakout from the Prisoner of War Camp located in Cowra, New South Wales, Australia, sounding a bugle to signal the commencement of the escape and died during the escape attempt.

List of Hajime no Ippo volumes (41–60): Hajime no Ippo (はじめの一歩 , lit.  "The First Step") is a Japanese boxing manga series written and illustrated by George Morikawa.  It has been serialized by Kodansha in "Weekly Shōnen Magazine" since 1989 and collected in over 117 tankōbon to date.  It follows the story of high school student Makunouchi Ippo, as he begins his career in boxing and over time obtains many titles and defeats various opponents.

List of Hajime no Ippo volumes (61–80): Hajime no Ippo (はじめの一歩 , lit.  "The First Step") is a Japanese boxing manga series written and illustrated by George Morikawa.  It has been serialized by Kodansha in "Weekly Shōnen Magazine" since 1989 and collected in over 117 tankōbon to date.  It follows the story of high school student Makunouchi Ippo, as he begins his career in boxing and over time obtains many titles and defeats various opponents.

List of Hajime no Ippo volumes (81–100): Hajime no Ippo (はじめの一歩 , lit.  "The First Step") is a Japanese boxing manga series written and illustrated by George Morikawa.  It has been serialized by Kodansha in "Weekly Shōnen Magazine" since 1989 and collected in over 117 tankōbon to date.  It follows the story of high school student Makunouchi Ippo, as he begins his career in boxing and over time obtains many titles and defeats various opponents.

John Ranby: John Ranby (1703–1773) was a prominent English surgeon, who served in the household of King George II and wrote books on surgery.  His influence helped to instigate a corporation of surgeons distinct from barbers.

Melinda Ledbetter: Melinda Kae Ledbetter (born October 3, 1946), also known as Melinda Wilson, is an American talent manager who is the wife of singer-songwriter Brian Wilson of the Beach Boys.  She was formerly a model and car saleswoman.  Shortly after meeting Wilson in 1986, she helped instigate the court-ordered separation between him and his therapist Eugene Landy.  These events were later dramatized in Bill Pohlad's 2014 biopic "Love & Mercy", in which Ledbetter is portrayed by Elizabeth Banks.

Cowra breakout: The Cowra breakout occurred on 5 August 1944, when at least 1,104 Japanese prisoners of war attempted to escape from a prisoner of war camp near Cowra, in New South Wales, Australia.  It was the largest prison escape of World War II, as well as one of the bloodiest.  During the escape and ensuing manhunt, four Australian soldiers and 231 Japanese soldiers were killed.  The remaining escapees were captured and imprisoned.

Areani: The areani or arcani were a force of the Roman Empire, based in Roman Britain during the later part of the Roman occupation of the island.  They had played some part in the campaign of Constans in Britain in 343; later they helped to instigate the Great Conspiracy in 367-368.  Due to their participation in the Conspiracy, Count Theodosius disbanded them.

Rose Hill Plantation State Historic Site: Rose Hill Plantation State Historic Site is a historic site in Union County, South Carolina, that preserves the home of William H. Gist (1807-1874), the 68th governor of South Carolina.  Gist helped instigate a Secession Convention in South Carolina, which led to the creation of the Ordinance of Secession that preceded the Civil War.

Relief (military): Relief, as a military term, refers to the breaking of a siege or an encirclement by an outside force.  Relief may occur in conjunction with a breakout.  It is one of four possible conclusions of investment, the others being a breakout, surrender or reduction.  The force that effects relief is known as the "relieving force".  Following relief, the town or fortification is said to have been "relieved".

Supporting paragraphs: Hajime Toyoshima Cowra breakout
Answer: 5 August 1944