In July 1945, the last full month of operations, 662 aircraft of the India-China airlift delivered 71,042 tons, ICD's maximum monthly tonnage. Of this fleet, 332 were ICD transports, but 261 were combat aircraft from USAAF units temporarily assigned to the airlift. An average of 332 flights to China was scheduled daily. The India-China Division ATC had 34,000 USAAF personnel assigned, and including indigenous civilians of all nationalities employed in India, Burma, and China, 84,000 persons overall. It boasted an aircraft availability rate of more than 85%. ICD suffered 23 major accidents in July, with 37 crewmen killed, but the Hump accident rate declined to .358 aircraft per thousand hours of flight in July (one-fifth of what it had been in January 1944) and .239 in August. On 1 August 1945, to celebrate "Air Force Day", ICD laid on its largest mission of the airlift. Tunner wrote that ICD flew 1,118 round-trip sorties, averaging two per aircraft, and one C-54 logged three round trips in 22¼ hours of operations. 5,327 tons were delivered in one day without fatality, and with no major accidents. C-87s and C-109s carried 15% of the tonnage without mishap. Before the month ended, nearly 50,000 more tons were delivered. Eight major accidents resulted in only 11 deaths, at a rate of one death for every 2,925 trips (1/18 of what it had been in January 1944). The major accident rate of only 0.18 aircraft lost per 1000 hours was one-third of what it had been when Tunner took command, and one-eighth of that of January 1944. He considered ICD's safety record to be his greatest achievement. In his memoir Over the Hump, Tunner wrote: Tunner commanded the division until 10 November 1945. The deputy commander of ICD, former bomber commander Brig. Gen. Charles W. Lawrence, briefly commanded the division before it was disbanded on 15 November 1945. Operations on the low hump and in China The first significant diversion of India-China Wing resources to operations in the region other than the Hump airlift began in February 1944. The Japanese attack in Arakan, followed by an offensive against Imphal in March and April, resulted in assistance to the British that Hardin estimated reduced hump deliveries by 1,200 tons. The ICW also had a stake in resistance to the offensive because the threat to Imphal imperiled the Assam-Bengal railroad along which not just Hump cargo but fuel for