The Siamese invasion of Kedah (also known as the Kedah–Siam War or the War of the Whispered Enemy) was a military operation mounted by the Kingdom of Siam against the Sultanate of Kedah in November 1821, in the area of what is now northern Peninsular Malaysia.
Kubang Pasu, officially known as the Kingdom of Kubang Pasu Darul Qiyam (Malay: کرجاءن کوبڠ ڤاسو دار القيام, romanized: Kerajaan Kubang Pasu Darul Qiyam; Thai: เมืองกุปังปาสู; RTGS: Mueang Kupangpasu) was a Malay kingdom located in the northern Malay Peninsula. The state was established in 1839 as a gift to Tunku Anum of the Kedahan nobility, for his efforts in ending the conflict between Kedah and Siam in the aftermath of the Siamese invasion in 1821. The kingdom had two monarchs before it was re-integrated into Kedah in 1859.