US-Japan breakdown and the oil embargo
Japan depended on imported oil - about 80% from the United States. Through the 1930s it expanded in China (Manchuria 1931, full war 1937); the US replied with trade restrictions. After Japan occupied French Indochina (July 1941), the US froze its assets and imposed a full oil embargo, set to cripple Japan within two years. Rather than withdraw, its leaders seized Southeast Asia's oil and rubber by force; General Tojo (PM from October 1941) struck first.
Pearl Harbor: tactical win, strategic loss
On 7 December 1941 Japan's carrier aircraft surprise-attacked the US Pacific Fleet at Pearl Harbor, sinking or damaging several battleships (including USS Arizona) and killing over 2,400 Americans. Its success was limited, though: the US carriers were at sea and survived, and the oil tanks, dry docks and repair yards were untouched. Worst for Japan, it united US opinion: Congress declared war on 8 December and Germany and Italy followed, drawing America into the war.
Drawn from real examiner reports.
Judging success from one side only
On "how successful was Pearl Harbor?", weak answers list only the battleships sunk and casualties, or only the failures, and assert a verdict. A real judgement weighs both - the tactical damage and months of free movement AGAINST the surviving carriers, intact fuel/repair facilities and the political effect of uniting the US behind war - then decides which is stronger.
Digest, General exam technique (Papers 1, 2): Part (c) answers often argue only one side without weighing which is stronger.
Drifting outside the set dates
Weak answers bring in later Pacific War material (island-hopping, the atomic bombs) on a question about Pearl Harbor, Singapore or Midway. Stay in scope: a Pearl Harbor question is about late 1941; the Malaya/Singapore case study ends in early 1942; Midway is June 1942. Do not stray into 1943-45 campaigns outside the question.
Digest, General exam technique (Papers 1, 4): candidates include material outside the date range specified in the question.
Reasons for the attack vs consequences
"Why did Japan attack Pearl Harbor?" asks for causes - the oil embargo, the drive for resources, the wish to cripple the US fleet first. Weak answers instead narrate the attack or drift into its consequences (US entry into the war). Keep the reasons for the attack separate from what happened as a result.
Digest, General exam technique (Paper 1): candidates drift into describing effects when the question asked for causes.
Japan had several early advantages
"Why was Japan so successful early in Southeast Asia?" needs several separately explained reasons, not a single-factor story. Develop Japanese preparation and surprise; fast movement by bicycle infantry and light tanks; air superiority after sinking the Prince of Wales and Repulse; and weak, under-resourced Allied defences. Explain each, do not just narrate the campaign.
Digest, General exam technique (Paper 1): "why" answers need several developed reasons, not a single-factor narrative.
Pearl Harbor vs the Battle of Midway
These two are frequently confused. Pearl Harbor (December 1941) was Japan's surprise opening attack on the US Pacific Fleet's battleships. Midway (June 1942) was a later carrier battle in which the US sank four Japanese fleet carriers and seized the strategic initiative. One opened the Pacific War for Japan; the other turned it against Japan.
Battleships were hit, not the carriers
Candidates often say Pearl Harbor destroyed the US fleet. It devastated the battleships (several sunk or damaged, including USS Arizona), but the aircraft carriers were at sea that day and survived. Because carrier air power, not battleships, proved decisive in the Pacific, that distinction is crucial - the carriers won at Midway six months later.
Myth: Pearl Harbor destroyed the US carriers
Pearl Harbor devastated the US battleships (several sunk, including USS Arizona), but the carriers were at sea and survived. Carrier air power, not battleships, proved decisive in the Pacific, so their survival let the US fight back within months - at Midway, June 1942. Saying it "destroyed the US Navy" ignores that the carriers and the fuel and repair yards were spared.
Judge what Midway did and did not change
For "how far was Midway a turning point?", explain what shifted - Japan lost four carriers and many veteran pilots, giving air superiority and the initiative to the US - against what did not: the war ran three more years to 1945, so Midway shifted the initiative, not ended it.
Use content plus provenance in sources
For Paper 2 source questions, give a clear verdict early and use the source's content with its provenance and likely purpose - not provenance alone ("a Japanese source, so biased" is too weak). A biased source is still useful evidence of the perspective it represents.
Match the command word and dates
Match the command word: "Describe" (a) wants brief accurate points; "Explain why" (b) wants developed reasons, not narrative; "How far" (c) wants both sides and a judgement. Answer on causes or consequences exactly as asked, and keep within the dates the question names.
By the late 1930s, Japan's drive for resources and regional dominance in China had put it on a collision course with the United States. This Key Question traces that breakdown in relations, the Japanese decision to attack Pearl Harbor and how successful that attack really was, Japan's rapid early conquests in Southeast Asia (the case study of Malaya and Singapore), and the Battle of Midway, the naval battle that turned the tide of the Pacific War.
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