The Loss of Java: The Final Battles for the Possession of Java Fought by Allied Air, Naval and Land Forces in the Period of 18 February – 7 March 1942

PETER C. BOER was a President of the Corts Foundation and an Associate Professor at the Netherlands Defence Academy.

NUS Press (Reprint, 2017)
640 pages including Bibliography and Index


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The Loss of Java explains in detail the air, sea and land battles between the Allied and Japanese armed forces during the battle for Java that followed the evacuation of southern Sumatra in February 1942. Little has been written about the allied air campaign, or about why Dutch forces fought just one major land battle with the Japanese, the Battle of the Tjiater Pass, in the later stages of the struggle. This book is a translation of Het Verlies Van Java: Een kwestie van Air Power. De eindstrijd om Nederlands-Indie van de geallieerde lucht-, zee- en landstrijdkrschten in de periode van 18 februari t/m 7 maart 1942 (Amsterdam: Bataafsche Leeuw BV for the Koninklijke Militaire Academie, 2006).

Peter .C. Boer considers whether the assessment of Major General Van Oyen that deploying the Allied air forces might prevent the Japanese invasion of Java was realistic, and whether reliance on airpower limited the capacity of land and naval forces to repel Japan’s advances. The generally accepted idea is that the Allies were ineffective in their fight against the Japanese invaders but in fact, the Japanese suffered serious losses. Boer’s study shows that Dutch strategy grew out of a carefully devised plan of defence and that the battle for Java comprised not one (the Battle of the Java Sea) but four major engagements. However, Japanese commanders at various levels consciously took steps that exposed their forces to great risk but succeeded in putting the Allies under great pressure. In the end, the Royal Netherlands East Indies Army (KNIL) and the allied forces capitulated on 8 March 1942.

Boer goes on to describe four important research questions and how he intends to answer them: (i) How realistic was the assessment by the staff of Major-General Van Oyen (Air Officer Commanding Java Air Command) with regard to the chance of preventing a Japanese invasion by making use of the allied air forces. Was there indeed a small chance of making the Japanese postpone and subsequently cancel the invasion, and if so, how well was this opportunity used?, (ii) What role did Air Power play in the failure of the allied naval forces to eliminate the so-called ‘eastern’ invasion fleet of the Japanese?, (iii) What role did Air Power play in the failure of the KNIL to defeat the Japanese troops that had landed near Eretan Wetan, and, in particular, the units that had occupied Kalidjati and Soebang?, and (iv) What role did Air Power play in the failure of the KNIL to deny the Japanese troops that landed near Eretan Wetan access to the Bandoeng plateau?

The Loss of Java offers far more in the way of analysis of air strategy and overall results. In general, the Allied strategy—and in particular the strategy of van Oyen and the Dutch air commanders after 22 February—involved an attempt to delay the Japanese invasion of Java for as long as possible in the hope that British, Australian, and American reinforcements (such as USAAF air assets aboard the Langley and Sea Witch) could arrive and help defeat the Japanese. To that end, the air aspect of the Dutch plan involved undertaking specific missions—such as destroying Japanese stockpiles of aviation fuel—designed to prevent the enemy from gaining air superiority over Java. Without air superiority, so it was reckoned, the Imperial Japanese Navy would be unwilling to conduct an invasion because its transports and warships would remain threatened by Allied air power.

Delaying the invasion would in turn allow more time for Allied reinforcements to arrive. Thus, Boer concentrates on analyzing how the Allied air forces attempted to prevent the Japanese from gaining control of the sky over western Java. That means in Part 1 of the book he restricts himself to the period from 18 through 27 February, and he almost entirely ignores air operations (such as those by American units) that did not directly affect the strategic air plan.

Boer notes in particular that on 25 February, with the discovery that Japanese landing forces were steaming toward Java, van Oyen realized his plan to delay the invasion so that reinforcements could arrive—longshot as it was—had failed. At that point, the Dutch understood their last chance would be for the Allied naval squadron to sortie and destroy the invasion fleet. To that end, van Oyen ordered his remaining air assets to transfer to Ngoro in eastern Java where the planes could provide air cover for the naval sortie, and perhaps hit the Japanese fleet.

List of Maps
List of Illustrations
Preface, design of the study, aim and research questions
Introduction — The Japanese advance: Java given up by the allies

PART 1: The Battle for Air Superiority over western Java from 18 February 1942 up to and including 27 February 1942

Part 1A: A description and analysis of the deployment of fighters and anti-aircraft artillery

Chapter 1A.1: The air defence plans and the balance of strength on 18 February 1942

Chapter 1A.2: The fighter operations on 19 February 1942

Chapter 1A.3: The fighter operations on 20 February 1942

Chapter 1A.4: The fighter operations on 21 February 1942

Chapter 1A.5: The events and fighter operations on 22 and 23 February 1942

Chapter 1A.6: The fighter operations on 24 February 1942

Chapter 1A.7: The events and fighter operations on 25 February 1942

Chapter 1A.8: The events of 26 and 27 February 1942

Chapter 1A.9: The results of the air battle over western Java and a brief analysis

Part 1B: A description and analysis of the deployment of the bombers

Chapter 1B.1: The reorganisation of the allied bomber fleet after the evacuation of southern Sumatra

Chapter 1B.2: The bomber operations on 18 and 19 February 1942

Chapter 1B.3: The missions of 20 February 1942

Chapter 1B.4: The events and operations on 21 February 1942

Chapter 1B.5: The events and operations on 22 February 1942

Chapter 1B.6: The missions of 23 February 1942

Chapter 1B.7: The bomber operations on 24 February 1942

Chapter 1B.8: The missions of 25 February 1942

Chapter 1B.9: Crucial decisions on 25 February 1942

Chapter 1B.10: The events and missions carried out on 26 February 1942

Chapter 1B.11: The search for the Japanese invasion fleets and the bomber missions flown on 27 February 1942

Chapter 1B.12: The results attained, a concise analysis and some conclusions with regard to the struggle for air superiority

PART 2: The Battle of the Java Sea

Chapter 2.1: The air support for the Combined Striking Force on 26 February and in the morning of 27 February 1942

Chapter 2.2: The battle of the Java Sea

Chapter 2.3: The events and operations in western and eastern Java on 28 February 1942

Chapter 2.4: The air support during the battle of the Java Sea, an analysis and some conclusions

PART 3: The Battle of Kalidjati

Chapter 3.1: Introduction

Chapter 3.2: The allied organisation, strategy and resources

Chapter 3.3: The Japanese landing operation at Eretan Wetan and the first allied attacks

Chapter 3.4: The operations on 1 March 1942

Chapter 3.5: The operations on 2 March 1942

Chapter 3.6: The operations on 3 March 1942

Chapter 3.7: Analysis and conclusions

PART 4: The Battle of the Tjiater Pass

Chapter 4.1: Introduction

Chapter 4.2: The battle on 4 March 1942

Chapter 4.3: The battle on 5 March 1942

Chapter 4.4: The battle on 6 March 1942

Chapter 4.5: The battle on 7 March 1942

Chapter 4.6: Analysis and conclusions

PART 5: Conclusions

Attachment I: Abbreviations
Attachment 2: Data on the Most Important Aircraft Used
Attachment 3: Data on the Composition of the Most Important Type of KNIL Units

Weight 0.925 kg
Dimensions 22.9 × 15.3 × 2.4 cm





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