5.3 Japan defeat

[4m] Two reasons Japan was moving towards defeat by 1943?

P1: Japan's empire was overextended and difficult to defend. Evidence: by mid-1942 Japan occupied almost all Southeast Asia. P2: Japan lacked resources/manpower. Evidence: by 1943 it struggled with limited funds, resources and manpower while Allied victories reduced aircraft carriers and experienced pilots.

[4m] Two features of island hopping?

P1: Allies attacked weaker Japanese-held islands one by one. Evidence: used against islands such as Rabaul, Saipan and Tinian. P2: Captured islands became Allied bases for further attacks. Evidence: strategy continued from 1942 to 1945.

[4m] Two effects of island hopping on Japan?

P1: Japanese islands were isolated. Evidence: food, medicine and weapons supplies were disrupted. P2: Japanese forces became weaker and lost more islands. Evidence: Allies continued island hopping from 1942–1945.

[4m] Why was Rabaul important to Japan?

P1: It was a naval and air-force base. Evidence: Japan occupied Rabaul on 23 February 1942 and made it an assembly/repair centre. P2: It protected New Guinea and Guadalcanal. Evidence: about 100,000 Japanese land troops were stationed there in 1943.

[4m] Two effects of Allied isolation of Rabaul?

P1: Supplies were cut, causing starvation and disease. Evidence: Allied naval forces/submarines attacked Japanese supply ships. P2: Japanese air power was weakened. Evidence: on 2 August 1944, 250 Japanese aircraft were shot down.

[4m] Describe the Battle of Iwo Jima.

P1: US troops landed on 19 February 1945 against a 21,000-strong Japanese garrison. P2: US captured Mount Suribachi on 23 February and declared complete control of Iwo Jima on 26 March 1945.

[4m] Why was Iwo Jima important to the US?

P1: It could provide an airfield close to Japan. Evidence: Iwo Jima had three Japanese air-force bases. P2: Long-range bombers could attack Japanese industry/economy and return safely.

[4m] Describe the Battle of Okinawa.

P1: US invasion began 1 April 1945; Japanese resistance developed around Cape Motobu and the Shuri Defence Line. P2: The battle lasted three months and ended with US victory on 22 June 1945.

[4m] Two examples of losses at Okinawa?

P1: Over 12,000 US soldiers were killed and 36,000 wounded; Japan lost 110,000 soldiers. P2: About 150,000 Okinawans died or were forced to commit suicide.

[4m] Two features of Japanese resistance at Okinawa?

P1: Japan launched over 1,000 kamikaze attacks plus several thousand conventional air attacks. P2: Children were mobilised; 1,780 schoolboys aged 14–17 served on the front line.

[4m] Describe Hiroshima atomic bombing.

P1: Hiroshima was bombed on 6 August 1945. P2: Over 66,000 were killed instantly, 70,000+ injured and two-thirds of the city's buildings destroyed instantly.

[4m] Describe Nagasaki atomic bombing.

P1: Nagasaki was bombed on 9 August 1945 after clouds prevented attack on original target Kokura. P2: Source estimates 60,000–80,000 deaths in Nagasaki.

[4m] Describe Japan's surrender in August 1945.

P1: Hiroshima was bombed 6 August and Nagasaki 9 August 1945.

P2: Japan surrendered unconditionally and Emperor Hirohito announced surrender on 15 August 1945.

[4m] Two facts about Allied POWs held by Japan?

P1: Over 140,000 became Japanese POWs held in 775 detention camps; 185 camps were in Japan. P2: An estimated 3,500 detainees died in the camps.

[4m] Treatment of POWs on Thai-Burma Death Railway?

P1: About 61,000 detainees were used as forced labour in harsh conditions with poor health facilities. P2: About 13,000 of those sent to work there died.

[6m] Why was island hopping effective?

P1: It isolated Japanese positions, cutting food, medicine and weapons. Evidence: used against Rabaul, Saipan and Tinian from 1942–1945. P2: Captured islands became Allied military bases for rapid further attacks and easier tracking of Japanese movements.

[6m] Why was Allied strategy at Rabaul successful?

P1: Naval forces/submarines isolated Rabaul and stopped supplies; thousands died from starvation/disease. Evidence: about 100,000 Japanese land troops were there in 1943.

P2: Air attacks weakened Japanese air power. Evidence: 250 Japanese aircraft shot down on 2 August 1944; Allies lost 151 aircraft and 25 pilots.

[6m] Why was Iwo Jima strategically important?

P1: Its three Japanese air bases could become US bases for long-range bombing of Japan.

P2: It brought the US closer to the homeland. Evidence: landing 19 Feb 1945; Mount Suribachi captured 23 Feb; complete control 26 Mar 1945.

[6m] Why was Okinawa important in Japan's defeat?

P1: Its airfields and harbours provided a base for direct attacks on Japan. Evidence: US invaded 1 Apr and won 22 Jun 1945.

P2: Japan suffered devastating losses. Evidence: 110,000 Japanese soldiers killed and about 150,000 Okinawans died or were forced to commit suicide.

[6m] Why did resistance at Okinawa cause heavy Allied losses?

P1: Strong Japanese positions around Cape Motobu/Shuri Defence Line prolonged fighting from 1 Apr–22 Jun 1945.

P2: Japan launched 1,000+ kamikaze and several thousand conventional air attacks. Evidence: 12,000+ US soldiers killed and 36,000 wounded.

[6m] Why did the US use atomic bombs?

P1: Japan refused unconditional surrender after the Potsdam Declaration even after Germany surrendered in July 1945.

P2: US saw atomic bombing as an alternative to sending more ground troops. Evidence: Allied scientists had worked on the Manhattan Project since 1942.

[6m] How did atomic bombs contribute to surrender?

P1: Hiroshima showed unprecedented destruction. Evidence: 6 Aug 1945; 66,000+ killed instantly, 70,000+ injured, two-thirds of buildings destroyed instantly.

P2: Nagasaki showed attacks could continue. Evidence: bombed 9 Aug; Hirohito announced surrender 15 Aug 1945.

[6m] Why did Allied POWs suffer under Japan?

P1: Japan used prisoners as forced labour due to manpower/resource shortages. Evidence: 140,000+ POWs; over half became forced labourers.

P2: Conditions were harsh and prisoners were malnourished and lacked healthcare. Evidence: about 61,000 worked on Thai-Burma Railway and 13,000 died.

[10m] 'Island hopping was the main reason for Japan's defeat in 1945.' How far agree?

INTRO: Island hopping steadily weakened Japan, but other factors also mattered.

AGREE 1: It isolated Japanese positions and disrupted food, medicine and weapons; used from 1942–1945 at Rabaul, Saipan and Tinian.

AGREE 2: Captured islands became Allied bases; at Rabaul 250 Japanese aircraft were shot down on 2 Aug 1944.

DISAGREE 1: Major battles brought Allies close to Japan: Iwo Jima captured 26 Mar 1945; Okinawa 22 Jun, with 110,000 Japanese soldiers killed.

DISAGREE 2: Atomic bombs created final pressure: Hiroshima 6 Aug and Nagasaki 9 Aug; surrender announced 15 Aug.

CONCLUSION: island hopping was crucial to weakening Japan, but final defeat resulted from cumulative Allied victories and atomic bombing.

[10m] 'Okinawa was the most important military reason for Japan's defeat.' How far agree?

INTRO: Okinawa was a major strategic defeat, but earlier island hopping and Iwo Jima had already weakened Japan.

AGREE 1: Okinawa gave US airfields/harbours close to Japan; invasion 1 Apr, victory 22 Jun 1945.

AGREE 2: Japanese losses were enormous: 110,000 soldiers killed, about 150,000 Okinawans dead/forced to suicide, and 1,000+ kamikaze attacks.

DISAGREE 1: Island hopping had weakened Japan from 1942–1945 at Rabaul, Saipan and Tinian.

DISAGREE 2: Iwo Jima was strategically important; US landed 19 Feb and controlled it by 26 Mar 1945. CONCLUSION: Okinawa exposed Japan directly to attack, but it was the culmination of a longer Allied advance.

[10m] 'Atomic bombs were the main reason Japan surrendered in 1945.' How far agree?

INTRO: Atomic bombing immediately preceded surrender, but Japan was already severely weakened.

AGREE 1: Hiroshima on 6 Aug 1945 killed 66,000+ instantly, injured 70,000+ and destroyed two-thirds of buildings instantly.

AGREE 2: Nagasaki on 9 Aug caused 60,000–80,000 deaths; Hirohito announced surrender 15 Aug.

DISAGREE 1: Japan's military position was collapsing: Iwo Jima fell 26 Mar and Okinawa 22 Jun, where 110,000 Japanese soldiers died.

DISAGREE 2: By 1943 Japan had limited funds, resources/manpower and island hopping disrupted supplies from 1942–45.

CONCLUSION: atomic bombs were the immediate major pressure, but they acted upon a Japan already badly weakened by Allied victories and shortages.

[10m] 'Japan's overextended empire was the main reason for its defeat.' How far agree?

INTRO: Overextension made Japan difficult to defend, but Allied strategy/resources exploited this weakness.

AGREE 1: By mid-1942 Japan occupied almost all Southeast Asia, a huge area to manage.

AGREE 2: By 1943 it struggled with limited funds, resources and manpower; at Rabaul isolation caused starvation/disease.

DISAGREE 1: Allied island hopping from 1942–45 systematically isolated positions such as Rabaul, Saipan and Tinian.

DISAGREE 2: Major Allied victories destroyed forces near Japan: Iwo Jima fell 26 Mar 1945 and Okinawa 22 Jun, with 110,000 Japanese soldiers killed.

CONCLUSION: overextension was a major structural weakness, but Allied resources and strategy turned that weakness into defeat.

[10m] 'Iwo Jima was more important than Okinawa in defeating Japan.' How far agree?

INTRO: Both islands brought the US closer to Japan but had different strategic value.

AGREE 1: Iwo Jima's three air bases could support long-range attacks on Japan; complete US control came 26 Mar 1945.

AGREE 2: Its capture showed Japan's outer defences weakening: 21,000 Japanese defended it; US landed 19 Feb and took Mount Suribachi 23 Feb.

DISAGREE 1: Okinawa's airfields/harbours were valuable for direct attacks; US invaded 1 Apr and won 22 Jun 1945.

DISAGREE 2: Okinawa produced catastrophic Japanese losses: 110,000 soldiers killed and about 150,000 Okinawans died/were forced to suicide.

CONCLUSION: Iwo Jima was vital for air operations, but Okinawa more clearly placed Allied forces at Japan's doorstep.