Japanese Attack on Trincomalee - HMS Erebus
- Si Biggs
- Jan 9
- 4 min read
Unit/ Formation: HM Ships
Location: Trincomalee
Period/ Conflict: World War II
Year: 1942
Date/s: 9th April 1942
The Indian Ocean raid, also known as Operation C or Battle of Ceylon in Japanese, was a naval sortie carried out by the Imperial Japanese Navy (IJN) from 31 March to 10 April 1942. Japanese aircraft carriers under Admiral Chūichi Nagumo struck Allied shipping and naval bases around British Ceylon, but failed to locate and destroy the bulk of the British Eastern Fleet. The Eastern Fleet, commanded by Admiral Sir James Somerville, was forewarned by intelligence and sailed from its bases prior to the raid; its attempt to attack the Japanese was frustrated by poor tactical intelligence.
Following the attack, the British expected a major Japanese offensive in the Indian Ocean. The main base of the Eastern Fleet relocated to East Africa, and Ceylon was reinforced, but Somerville kept his fast carrier division, Force A, "in Indian waters, to be ready to deal with any attempt by the enemy to command those waters with light forces only."
However, the Japanese had no short-term plans to follow up on their success, and within the year operations in the Pacific made it impossible to do so.
Royal Marines on board would be injured or killed (figures in brackets) on the following ships;
5 April 1942
HMS Dorsetshire (24)
HMS Cornwall (22)
9 April 1942
HMS Erebus (5)
HMS Hermes (29)
Japanese Attack on Trincomalee
By 8 April, the Eastern Fleet had withdrawn and the Japanese fleet was approaching Trincomalee from the east. The Japanese fleet was detected by a RAF Catalina at 15:17 on 8 April and the harbour at Trincomalee was cleared that night. Hermes, escorted by HMAS Vampire, was sent south along the coast.
The Japanese air search on the morning of 9 April was limited as on 5 April, as British carriers were no longer expected. The Japanese strike group of 132 aircraft was detected at 07:06 on 9 April by the radar of AMES 272 at a range of 91 mi (146 km).
The defence sent 17 Hurricanes and six Fulmars that took off in time and inflicted the first kills of the battle when a section of Hurricanes attacked three Zeroes and shot down two.
The China Bay airbase and the port were severely bombed and the monitor HMS Erebus was damaged, killing 4 seaman and 5 Royal Marines, SS Sagaing, a merchant ship carrying aircraft and ammunition, was set on fire and abandoned.
Eight Hurricanes and a Fulmar were lost, although no serviceable fighters were lost on the ground and the Japanese lost four aircraft.
At 07:16 another Catalina from 413 Squadron RCAF spotted the Japanese fleet, but was shot down while reporting.
[1]
HMS Erebus
HMS Erebus was a First World War monitor launched on 19 June 1916 and which served in both world wars. She and her sister ship Terror are known as the Erebus class.
They were named after the two bomb vessels sent to investigate the Northwest Passage as part of Franklin's lost expedition (1845–1848), in which all 129 members eventually perished.
Monitors were designed as stable gun platforms with a shallow draught to allow operations close inshore in support of land operations, and were not intended to contest naval battles. Erebus was equipped with two 15 in (381 mm)/42 guns in a single forward turret mounted on a tall barbette to extend the range of fire to 40,000 yd (22.7 mi; 36.6 km).
The Erebus class were designed to outrange German heavy shore batteries and they were also fitted with highly effective anti-torpedo bulges on each side of the hull.
The monitor's had a crew of around 300, and a Royal Marines detachment of 35 who manned the main gun including gun control and direction as well as other duties.
B a t t l e H o n o u r s
BELGIAN COAST 1916-18 - ZEEBRUGGE 1918 - ENGLISH CHANNEL 1940-44 - NORTH SEA 1940-41 - ATLANTIC 1943 - MEDITERRANEAN 1943 - SICILY 1943 - NORMANDY 1944 - WALCHEREN 194 4
Log 1942
January Nominated for foreign service in East Indies for AA defence at Trincomalee.
February On completion of preparation for foreign service took passage to join East Indies Station.
March Arrived at Trincomalee.
April Deployed at Trincomalee.
9th Under Japanese air attack whilst in harbour and sustained casualties and damage.
(See WAR WITH JAPAN (HMSO) for details.)
(Note: Several aircraft were destroyed by defences to which this ship contributed.)
May Under repair
to (Note: In view of the lack of repair facilities it is assumed the work was done at Bombay.)
July
August Resumed Fleet service and took passage to Kilindini.
Nominated for support of planned landings at Majunga, Madagascar to complete occupation
of the island (Operation JANE).
(Note: Operation IRONCLAD carried out in May 1942 had occupied the French naval base
at Diego Suarez but the strategic value of Madagascar was essential to prevent any
any invasion by Japanese forces).
September Joined HM Battleship WARSPITE, HM Cruisers BIRMINGHAM, GAMBIA, MANXMAN,
DAUNTLESS and CARADOC, HM Aircraft Carrier ILLUSTRIOUS, HM Seaplane Carrier
ALBATROSS (Deployed as HQ Ship) screened by 12 destroyers with additional minesweeping
support to prepare for landings,
(Note: Exercise TOUCHSTONE was carried out to prepare for the landings.
10th Present at first assault landings but naval gunfire support was not required..
Returned to Kilindini on release from JANE.
October Nominated for return to UK and took passage via Cape of Good Hope
November Rejoined Home Fleet.
to Deployed in Home waters.
December
[2]
Related Royal Marines 'Dits'
References/ Read More:
[1] Wikipedia - Indian Ocean Raid
[2] Navy History Net - HMS Erebus RN Monitor
Reading about the discipline and early morning readiness during historical naval operations really puts our modern routines into perspective. It reminds me of the quiet focus I find when waking up in the capital, checking the sehri time london to prepare for the day ahead. Much like the sailors who stood watch at dawn, there is something deeply grounding about starting your day with purpose while the rest of the city is still asleep.
The history of the HMS Erebus and the defense of Trincomalee is such a gripping piece of naval heritage. Reading about the resilience of those sailors reminds me of my grandfather, who served in the Navy and always emphasized the importance of being prepared for any battle, whether at sea or in life. When I was transitioning out of a long-term role recently, I felt like I was navigating uncharted waters and realized I wasn't prepared for the modern job market at all. To get my bearings, I ended up looking into Resume Writing Services for Job Seekers just to make sure my service history was translated properly for civilian recruiters. It really helped me find my footing again, much like…
I found your account of the Japanese attack on Trincomalee and HMS Erebus really gripping and detailed, it brought the history to life for me in a way I hadn’t felt before. When I wrote my own long paper on a naval battle, I even looked for law editing services for university students to help sharpen my arguments and catch mistakes. Your post reminded me how careful research makes stories matter more.
This post gives a clear and detailed look at the Japanese attack on Trincomalee and the role of HMS Erebus during a tense moment in World War II. The timeline and losses made the event feel real and heavy. When I was studying history alongside science courses, I remember I used finish my online biology class at that time so I could focus better on readings like this. Learning history reminds me how preparation and timing shape outcomes.
This post gave a clear picture of how sudden and serious the Japanese attack on Trincomalee was, especially the pressure faced by ships like HMS Erebus. When I studied this topic during my naval history class, I remember struggling to connect the timeline with the wider war impact, so I actually used write my assignment for me that time to help organize my thoughts. Reading this now makes me appreciate how important well-researched history writing really is.