In 1845, James Brooke, with the naval support of Sir Thomas Cochrane, sent an expedition against the Kingdom of Marudu in modern Eastern Sabah. It is known as the Marudu expedition, and took place during the Anglo-Bruneian War.
After Brooke and Cochrane succeeded in expelling Pengiran Usop, Osman's supposed ally, from Brunei, they sailed to Marudu to confront Osman himself. Brooke's defamation of Osman, which Brooke intensified through letter-writing campaigns from February 1845 onward, upon learning of his appointment as agent, thus influencing all important authorities in London and India, as well as the naval officers on the ground, had proven successful. Brooke had managed to convince Cochrane that Syarif might resist British expansion of Osman's influence over Sabah not yet occupied by Western powers, and that it would therefore be more advantageous to destroy Syarif on the grounds of piracy.[1]
An armed conflict was planned from the outset.[2] After all, Admiral Cochrane led a fleet of eight ships[2] that reached Marudu Bay on August 17, 1845. Five of them, namely the Vixen, Pluto, Nemesis, Wolverine, and Cruiser, sailed deep into the bay. Cochrane gave Captain Talbot, who had also been present at negotiations in Brunei, command of the upcoming operation and sent him with boats loaded with 24 cannons, nine of which were gunboats, to Syarif Osman's position to attack him if he refused to surrender. If the enemy proved too superior, thus jeopardizing a certain victory, Talbot was to withdraw and contact the admiral.[2] Cochrane did not want to take any risks.
Early on August 19, 1845, Talbot's units set out for Osman's fortress.4 Neither the captain nor other British troops knew Osman's exact position and strength. So Talbot was guided by two local Bruneians. Brooke claimed that many locals could be found who would willingly betray Syarif Osman's position. However, the British apparently had trouble recruiting volunteers for this task. Cree commented:[citation needed]
"A couple of natives of Brunei were taken as pilots: they did not relish the job, but had no choice but to do their work properly."
—Levien (1981)
The two guides probably didn't do their job as accurately as Cree had hoped, because they didn't provide Talbot with precise enough information about the location of the fortifications. Talbot made a relatively serious error by not sending scouts to explore the area. He relied on the information provided by the two locals:[citation needed]
"The forts appeared to us to stand on a tongue of land, from which we were separated by the river, which at that point divided into two branches, and the pilots declared such to be the case."
—Talbot to Cochrane
The larger fortress was accessible by land from one side:[citation needed]
"Osman's main fort could have been attacked by land and, as soldiers say, his flank could have been turned. The troops could then have got through to the houses of the village which lay behind the defenses and caused great damage."
—S. Evans (1978)
As Talbot and his forces negotiated the final, sharp bend in the river, he surveyed the positions. They consisted of two forts separated by a stream, one armed with three and the other with eight cannons. Behind the forts lay settlements, fields, and plantations. The forts were decorated with colorful flags, which the British interpreted as a sign of the presence of many leaders and distinguished figures. Osman's own banner, the red flag with the tiger's head, flew over the fortifications.[3]
Talbot led all the boats directly to the obstacle that blocked the way to the forts: a barrier made of wood and iron, barely 200 meters from the fort.8 Syarif Osman's cannons, especially the three in the smaller fort, were designed to target ships that had to stop before this barrier.
Syarif Osman sent a parliamentarian, Syarif Muhammad, to inquire about the reason for the British arrival. This action suggests that Osman may have been less informed about the British intentions than Brooke and Cochrane stated in their accounts. Talbot replied that Osman should surrender within 30 minutes. Mahomed returned to Osman, who in turn demanded that British officers come to the fortress to negotiate. Talbot refused because the British suspected a trap laid by Osman. Brooke later remarked that he was relieved by Talbot's decision.[4]
"Even their last desperate attempts to retain Brooke's friendship or stave off his attack were interpreted by Brooke as treacherous. [...] Usman hoisted a flag of truth to the attacking British at Marudu in 1845 which was regarded as a trick, [...].."
—Bassett (1980)
Meanwhile, Syarif Osman was ordered to board Cochrane's ship.[5] After Syarif Muhammad returned to the fortress a second time without accomplishing anything, the British sailors and soldiers began to hack at the barrier with axes to allow the boats to pass through. When Osman saw this forced entry, he ordered the opening fire.[6] Talbot was able to claim that the enemy had fired the first shot and thus caused the battle.
Battle
Talbot's men were exposed to cannon fire for about an hour. Of the six to eight British dead and about twenty wounded, most fell during this initial exchange of fire. It is unclear whether Osman's men fired at any significant volume afterward. Stephen Evans attributed the relatively rapid end of the battle to an operator's error by the fortress gunners[6]
Abbas/Bali explained Osman's defeat as treason and underestimation of the naval gunfire, as Osman had not expected the guns to reach his fortress. The interpretation that Osman lost the battle due to the enemy's superior force may be the most accurate. Shortly after the initial exchange of fire, Talbot landed some of his men on the right bank and aimed rockets at the fortress. The rocket party landed on the right bank and fired with good effect into the stockade.[1]
Syarif Osman likely didn't expect the British to have weapons with such a range at their disposal. The rockets caused devastating damage to the fortress. Nevertheless, the defenders tried to use the still-functioning cannons to prevent the British from penetrating the fortifications. The persistent bombardment and defense of the barrier may have been Osman's only real chance to prevent the storming of his fortress and city. What Rutter described as the devil-may-care spirit of Osman's men was more likely an expression of a desperate defense. When the British finally broke through the barrier, some hand-to-hand combat still took place, but most of the defenders probably had no doubt that the battle was finally decided. They fled, even though they might have had the best chance against the numerically inferior British in close combat. Perhaps the loss of capable fighters due to the rocket fire was too great for an effective defense.[1]
Aftermath
Whether Syarif Osman himself was killed during the battle is not clear from the eyewitness accounts. He was presumably wounded and carried off. Talbot made no mention of Osman's fate in his report. Cochrane reported that he was wounded, but did not know whether he was dead or alive. In a later letter to the Admiralty, Cochrane gave the impression that he assumed Syarif survived; he triumphantly stated:[citation needed]
"And as I believe, I have left him [Osman] with nothing but the clothes he wore, and a small house in the country to which I understand he sent his wives and children the evening before the attack, he has no means of recommencing his piratical proceedings!"
—Cochrane
Cree presumed that Osman had been wounded. Brooke, too, was unsure whether Osman was dead a day after the battle. In the Journal Mundy, he initially reported that Osman had been driven into the mountains. The newspaper Friend of China reported on September 17, 1845, that at the time of the report, ten Europeans and 30 men from Manila were still in Osman's captivity as slaves. All these reports call into question the later frequently and persistently repeated statement that Osman succumbed to his wound in the neck. The British found several Sharifs and leaders among the dead in the fortress area, but Syarif Osman was not discovered.[1]
Wright assumes that Osman fled to Tungku to join his friend Raja Laut. Some authors point out that Osman's followers fled to Tungku after the battle. Baring-Gould/Bampfylde, however, argue that in 1846 some Iranun retreated from the towns of Tempasuk and Pindusan, destroyed by Captain Mundy, to Tungku to continue their piratical activities, but the Marudu survivors settled on Palawan and in Bongon (Marudu Bay) and were therefore not directly pirates.[1]
Many cannons were brought aboard the ships or rendered unusable. The order to burn the fortress and the perahus prompted the soldiers to set their own fires, sometimes threatening to be trapped by the fire. To the regret of the officers, several camphor warehouses were accidentally burned down. The valuable raw material could have been sold. Finally, the British captured some domestic animals and concluded their mission with a picnic.[1]
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Kingdom of Marudu 
United Kingdom 
Syarif Osman (WIA)