| Battle of the Riau Islands | |||||||||
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| Part of World War II, Pacific War, Dutch East Indies campaign | |||||||||
 Map of the Riau Islands | |||||||||
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| Belligerents | |||||||||
 United Kingdom | |||||||||
| Commanders and leaders | |||||||||
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| Units involved | |||||||||
Malaya Command Remnants |
 Japanese Navy | ||||||||
| Casualties and losses | |||||||||
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Netherlands: 4 Killed 20 Wounded | 0 | ||||||||
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450 civilians killed[1] 40 civilians injured[1] More unaccounted for | |||||||||
The Battle of the Riau Islands (Dutch: Riouw) took place at the beginning of March 1942 during the Pacific War in the Second World War.