Tengku Dhiauddin Zainal Rashid, also known as…

Tengku Dhiauddin Zainal Rashid, also known as Tengku Kudin, a prince from Kedah, had married into the Selangor royal family in 1867.

The Sultan had appointed his son-in-law as Vice Yamtuan and arbitrator twice during the Klang War; first on June 26, 1868 and again on July 22, 1871.

Raja Mahadi, however, had flatly refused the peace effort.

Offended by Raja Mahadi's blunt no, Tengku Kudin had sided with Raja Abdullah and Raja Ismail instead and this had precipitated a war.

The coalition against Raja Mahadi suffers a setback when Raja Abdullah dies of natural causes.

However, the influential Yap Ah Loy of Kuala Lumpur joins Tengku Kudin's cause.