In our timeline ABDACOM (American-British-Dutch-Australia Command) was set up as a unified command of all Allied forces in South East Asia in an effort to jointly resist the Japanese offensive. Activated on 7 January 1942 it utterly failed in it's task of defending the Malay Barrier and was disbanded less than two months later. ABDACOM faced a myriad of problems but being only set up a month after the hostilities started (and only conceived a week or two before being activated) made a bad hand worse.
OTL starting up ABDACOM was not possible. The United States were neutral and it wasn't until december 1941 that this position started to change. Furthermore, while the Netherlands and the United Kingdom were certainly allies in the war against Germany, this did not mean that the British Empire and the Dutch East Indies were allies in Asia! The DEI government (which had/took quite some autonomy after the occupation of Holland) knew that it would be doomed in a one-on-one war against the Japanese and didn't want to antagonize them by anything but strict neutrality towards the British. For this reason there was barely any cooperation or coordination between the forces of Britain and Australia on one hand and the Dutch forces on the other. Australian forces destined for Ambon and Timor could only start moving after the Japanese attack on Pearl Harbor. During the campaigns in South East Asia it quickly became obvious that the Allied forces had not been exercising together. From signals to languages to SOPs the forces simply didn't match. A lot of those problems were being solved during the campaign but it was to little to late.
DEI neutrality was far from principled though. Money was raised to buy Spitfires for use in the Battle of Britain for example and the Governor-General made clear that he was perfectly willing to align the colony with the British Empire, provided the British Empire would do the same though. If the United Kingdom would guarantee the territorial integrity of the Dutch East Indies there was nothing standing in the way of a worldwide alliance. The British government balked at this though, as the Admiralty concluded it did not have the forces to guarantee that territorial integrity with more than words. The British Empire would only offer such a guarantee in concert with the US. Which refused to do so.
What if the British Empire did guarantee the DEI though? Would Japan use this as a Casus Belli to attack the British and Dutch colonies? If not, how much difference would a fully operational BDACOM make when the Japanese come knocking? At the very least the KNIL would be a bit better prepared as it's neutrality severely hampered it's efforts at buying arms in the United States. Besides that the Aussies and Dutch might have been able to work out an agreement on more equal footing with the British instead of being faced with a fait accompli by the Americans and British together as OTL. This in turn could have positive effects such as not having the naval recon units being combined with the other air units.
OTL starting up ABDACOM was not possible. The United States were neutral and it wasn't until december 1941 that this position started to change. Furthermore, while the Netherlands and the United Kingdom were certainly allies in the war against Germany, this did not mean that the British Empire and the Dutch East Indies were allies in Asia! The DEI government (which had/took quite some autonomy after the occupation of Holland) knew that it would be doomed in a one-on-one war against the Japanese and didn't want to antagonize them by anything but strict neutrality towards the British. For this reason there was barely any cooperation or coordination between the forces of Britain and Australia on one hand and the Dutch forces on the other. Australian forces destined for Ambon and Timor could only start moving after the Japanese attack on Pearl Harbor. During the campaigns in South East Asia it quickly became obvious that the Allied forces had not been exercising together. From signals to languages to SOPs the forces simply didn't match. A lot of those problems were being solved during the campaign but it was to little to late.
DEI neutrality was far from principled though. Money was raised to buy Spitfires for use in the Battle of Britain for example and the Governor-General made clear that he was perfectly willing to align the colony with the British Empire, provided the British Empire would do the same though. If the United Kingdom would guarantee the territorial integrity of the Dutch East Indies there was nothing standing in the way of a worldwide alliance. The British government balked at this though, as the Admiralty concluded it did not have the forces to guarantee that territorial integrity with more than words. The British Empire would only offer such a guarantee in concert with the US. Which refused to do so.
What if the British Empire did guarantee the DEI though? Would Japan use this as a Casus Belli to attack the British and Dutch colonies? If not, how much difference would a fully operational BDACOM make when the Japanese come knocking? At the very least the KNIL would be a bit better prepared as it's neutrality severely hampered it's efforts at buying arms in the United States. Besides that the Aussies and Dutch might have been able to work out an agreement on more equal footing with the British instead of being faced with a fait accompli by the Americans and British together as OTL. This in turn could have positive effects such as not having the naval recon units being combined with the other air units.
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