Klang War

Klang War
Date1867–1874
Location
Result

Raja Abdullah/Tengku Kudin faction victory

Belligerents

Selangor Raja Abdullah loyalists
Pahang Pahang Kingdom
Hai San
Supported by:
Selangor Sultan of Selangor

 United Kingdom (from 1873)

Selangor Raja Mahdi loyalists
Sumatran groups
Ghee Hin
Supported by:

Selangor Local Malay chiefs
Commanders and leaders
Raja Abdullah
Raja Ismail
Tengku Kudin
Mohamed Tahir
Yap Ah Loy
Raja Mahadi
Raja Mahmud
Syed Mashhor
Chong Chong 

The Klang War or Selangor Civil War was a series of conflicts that lasted from 1867 to 1874 in the Malay state of Selangor in the Malay Peninsula (modern-day Malaysia).

It was initially fought between Raja Abdullah, the administrator of the Klang Valley, and Raja Mahdi. It was joined by Tengku Kudin (Tengku Dhiauddin, also spelt Ziauddin), a Kedahan prince, as well as other Malay and Chinese factions. The war was eventually won by Tengku Kudin and Abdullah's son, Raja Ismail.