On This Day Pearl Harbor

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43 BC: Roman orator and advocate Cicero is executed on the orders of the warlord Mark Antony.
909: Sa'id ibn Hussein, the 'divinely guided one', establishes a Shiite caliphate in Tunis, rival to Baghdad.
1941: Japan launches a surprise attack with 350 aircraft on the US Pacific Fleet at Pearl Harbor, Hawaii.


Introduction
It all happened so quickly. At 7.55am on Sunday 7 December 1941, the first of two waves of Japanese aircraft began their deadly attack on the US Pacific Fleet, moored at Pearl Harbor on the Pacific island of Oahu. Within two hours, five battleships had been sunk, another 16 damaged, and 188 aircraft destroyed. Only chance saved three US aircraft carriers, usually stationed at Pearl Harbor but assigned elsewhere on the day. The attacks killed under 100 Japanese but over 2,400 Americans, with another 1,178 injured.


... the attacks had been slowly brewing for years.
Although swift in execution, the attacks had been slowly brewing for years. The US had once looked upon Japanese ambitions with a level of sympathy, even indulgence. Hit hard by the Great Depression of the early 1930s, however, Japanese disillusion with party government grew and moderates gave way to militants. In 1931 Japan occupied Manchuria in northern China. Over the decade conflict intensified and in July 1937 war was declared. As Japanese aggression increased, its relations with the US deteriorated.

Occupied Manchuria was rapidly exploited with the establishment of heavy and light industries. This was a practical necessity for Japan. Lacking in natural resources itself, the search for alternative supplies underpinned foreign and military policy throughout the decade and led to the attack on Pearl Harbor and the Pacific War.

On top of practical economic considerations, early military success and an inherent sense of racial superiority led Japan to believe that it deserved to dominate Asian politics. As with Nazi Germany and Fascist Italy, this combination bred an aggressive and neo-colonial foreign policy, the 'Greater East Asia Co-prosperity Sphere'. Higher birth-rates and economic considerations required more land; the gene-pool justified it.

 

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Relations with the US
A briefing of Japanese pilots before the attack © The policy increased in urgency as relations with the US sank further. Historically, Japan had relied on America to supply many natural and industrial resources. Increasingly alarmed by Japanese aggression, however, America allowed a commercial treaty dating from 1911 to lapse in January 1940. In July it followed up by embargoing scrap iron and aviation fuel. Things got worse in September when Japan signed the Tripartite Pact with Germany and Italy. It was now a formal member of the Axis alliance fighting the European War.


... Japan knew that a full-scale invasion of South-east Asia would prompt war with America.
This posed real problems. Although officially neutral, there was no doubt where American sympathies lay. President Franklin D. Roosevelt had already strained the sinews of neutrality by supplying Britain with money and arms under the 'lend-lease' agreement. The Tripartite Pact meant that supplies to Japan would indirectly be helping Italy and Germany; further embargoes followed.

For Japan, embroiled in a long war with China, these were disastrous. Considering its very survival under threat, Japan intensified the search for a permanent alternative. The most obvious target was South-east Asia, rich in minerals and oil. German success in Europe in 1940 had orphaned French and Dutch colonies in the region and they became the focus of Japanese attention.

While occupying French Indochina in July 1941, Japan knew that a full-scale invasion of South-east Asia would prompt war with America. It needed a mechanism to buy itself sufficient time and space to conquer successfully crucial targets like the Philippines, Burma and Malaya. The attack on Pearl Harbor was that mechanism; merely a means to an end. By destroying its Pacific Fleet, Japan expected to remove America from the Pacific equation for long enough to allow it to secure the resources it needed so desperately and hoped to crush American morale sufficiently to prompt Roosevelt to sue for peace.

An ill-prepared America
President Roosevelt declares war on Japan following the attack at Pearl Harbor. © With war so widely expected, why was America so woefully ill-prepared? Rumours that began in the war are still hanging around, well past their sell-by date, fuelled only by revisionist historians and conspiracy cranks. They claim Roosevelt was itching for war with Japan but was constrained by US neutrality, so needed a solid reason to fight. Hence they accuse him of suppressing prior knowledge of the attack, or of provoking it to enable America to enter the war by the back door. Some even say that the attack on Pearl Harbor was deliberately engineered by a crypto-communist president guilty of high treason.


In 1941 America was not ready for war.
It doesn't add up. In 1941 America was not ready for war. With US forces queuing for arms alongside Britain and Russia, Roosevelt knew he needed more time to build America's military capacity. If war was to come, he wanted Japan to be seen to be the aggressor, but Roosevelt was in no hurry.

Furthermore, he saw Germany as America's main enemy. This 'Europe first' strategy was affirmed with Churchill at the Arcadia conference in late December 1941. Roosevelt had already pushed neutrality to the limit and had assigned warships to accompany convoys in the Atlantic. War with Germany was only a matter of time: why choose to fight another with Japan? Even when European conflict came, it did so only on Hitler's invitation after he gratuitously declared war.