The start of enmity between Sebuyau, Balau and Undup Ibans against Saribas and Skrang Ibans  . The Malay leader Indra Lela, brother of Lela Wangsa of Lingga and Lela Pelawan, incited the Saribas and Skrang Ibans to war against the Sebuyau Dayaks in order to control them as stated below: Undoubtedly  the Malays did encourage Iban warfare, among Ibans themselves ( Indra Lela ) and against Malay-ruled peoples who evaded  URL The outbreak of intratribal warfare coincided roughly with the beginnings of friction with Brunei and contacts with the Illanuns and other sea raiders. But even prior to this  there had been fighting on several occasions, one of which is the story of Beti (Brauh Ngumbang) of Skrang and his quarrel with the Sebuyau warrior named Chagik who had unsuccessfully courted Riti who became Beti's seventh wife. Two more occasions after this but still long before the intra-tribal wars , men from the Saribas who had become involved in quarrels in their own home rivers fled to the Sebuyau settlements. They subsequently involved the Sebuyau people in the dispute with the Saribas Ibans. The first occasion was between two friends by the name of Brayun versus Janang over a lady known as Bremas, in the Ulu Samu during the chieftain of Seeing the son of Tuah. Brayun slashed one of Janang's ears who then fled to Sebuyau and returned with some Sebuyau people to attack Brayun's house. Another incident of the Saribas-Sebuyau hostility took place as a result of a quarrel over a tapang tree which is a source of honey at a small Bangkit stream which lies between the Paku and Rimbas rivers in Saribas. There were two longhouses here, one under the leadership of Anal and Sana and the other under Senabong who claimed ownership of the same tapang tree. Both sides agreed to settle the dispute over a diving (kelam ai) contest which Sana and Anal said that Senabong lost but he disagreed. Senabong people  migrated to Telong Semerang from which they first sent a war party back to their old home to fight against Sana and Anal. After they had migrated to Sebuyau, Senabong’s men again raided Bangkit but this time with the assistance of the Sebuyau people. By now  Sana and Anal were so worried by these attacks that they humbly invited Gerijih (Ai Marang) of Paku to come and live with them in Bangkit. After many more adventures, Gerijih finally defeated Senabong and took his head. The battles mentioned above were all between various groups of Ibans who lived at the mouths of different rivers. This intermittent struggle continued after 1839. It was because of these that the newly arrived James Brooke found that he could easily get the support of the Sebuyau, Undup and Balau Dayaks in his warfare against the Saribas and Skrang and later on against the Kanowit and Ulu URL The quarrel and war between the upper and downriver of Batang Ai resulted in the migration back to Batang Kanyau from which the Iban crossed over to the upper Batang Katibas and proceeded to the upper Batang Baleh, a branch of the batang Rajang.
The start of enmity between Sebuyau, Balau and Undup Ibans against Saribas and Skrang Ibans can be traced back to the incitements by the Malays who collected taxes on behalf of the Brunei Sultanate . The Malay leader Indra Lela, brother of Lela Wangsa of Lingga and Lela Pelawan, incited the Saribas and Skrang Ibans to war against the Sebuyau Dayaks in order to control them . Undoubtedly , the Malays did encourage Iban warfare, among Ibans themselves ( intratribal war ) and against Malay-ruled peoples who evaded contribution (intertribal URL The outbreak of intratribal warfare coincided roughly with the beginnings of friction with Brunei and contacts with the Illanuns and other sea raiders. However, even prior to this , there had been fighting on several occasions, one of which is the story of Beti (Brauh Ngumbang) of Skrang and his quarrel with the Sebuyau warrior named Chagik who had unsuccessfully courted Riti who became Beti's seventh wife. Two more occasions that led to the intra-tribal wars involved men from the Saribas who had become involved in quarrels in their own home rivers fled to the Sebuyau settlements. They subsequently involved the Sebuyau people in the dispute with the Saribas Ibans. The first occasion was between two friends by the name of Brayun versus Janang over a lady known as Bremas, in the Ulu Samu during the chieftain of Saing, the son of Tuah. Brayun slashed one of Janang's ears who then fled to Sebuyau and returned with some Sebuyau people to attack Brayun's house. Another incident of the Saribas-Sebuyau hostility took place as a result of a quarrel over a tapang tree which was a source of honey at a small Bangkit stream that lies between the Paku and Rimbas rivers in Saribas. There were two longhouses here, one under the leadership of Anal and Sana and the other under Senabong who claimed ownership of the same tapang tree. Both sides agreed to settle the dispute over a diving (kelam ai) contest which Sana and Anal claimed that Senabong had lost but he disagreed. Senabong people then migrated to Telong Semerang from which they first sent a war party back to their old home to fight against Sana and Anal. After they had migrated to Sebuyau, Senabong’s men again raided Bangkit but this time with the assistance of the Sebuyau people. By now , Sana and Anal were so worried by these attacks that they humbly invited Gerijih (Ai Marang) of Paku to come and live with them in Bangkit. After many more adventures, Gerijih finally defeated Senabong and took his head. The battles mentioned above were all between various groups of Ibans who lived at the mouths of different rivers. This intermittent struggle continued after 1839. It was because of these that the newly arrived James Brooke found that he could easily get the support of the Sebuyau, Undup and Balau Dayaks in his warfare against the Saribas and Skrang and later on against the Kanowit and Ulu URL The quarrel and war between the upper and downriver of Batang Ai resulted in the migration back to Batang Kanyau from which the Iban crossed over to the upper Batang Katibas and proceeded to the upper Batang Baleh, a branch of the Batang Rajang.
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can be traced back to the incitements by the Malays who collected taxes on behalf of the Brunei Sultanate
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intratribal war
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