Castilian War

Castilian War
	; Bruneian forces fighting Spanish forces
Date	16 April – 26 June 1578
Location	Borneo, Mindanao, and Sulu
Result	Status quo ante bellum
Belligerents
Bruneian Empire; Sulu Sultanate; Maguindanao ; Supported by:; Ottoman Empire; Portuguese Empire	Spanish Empire Captaincy General of the Philippines; Bruneian defectors;
Commanders and leaders
Sultan Saiful Rijal; Bendahara Sakam; Pengiran Kestani	Francisco de Sande; Pengiran Seri Lela or † ; Pengiran Seri Ratna †
Strength
1,000 men (royal guards); an unknown number of indigenous warriors; 62 guns; 50 ships	2,200 men: 200 Spaniards; 200 Mexicans; 1,500 Filipinos; 300 Bruneians; 40 ships
Casualties and losses
Unknown 170 artillery pieces; 27 ships and galleys captured	Unknown; presumably heavy; 17 men dead (by dysentery)

The Castilian War, also called the Spanish Expedition to Borneo, was a conflict between the Spanish Empire and several Muslim states in Southeast Asia, including the Sultanates of Brunei, Sulu, and Maguindanao. It is also considered as part of the Ottoman-Habsburg War, and that war is the beginning of relations between the Ottoman state and Brunei in 1560 to 1578.

^ Saunders, Graham E. (1994). A History of Brunei. Oxford University Press, USA. p. 55. ISBN 967-65-3049-2.
^ Saunders, Graham E. (1994). A History of Brunei. Oxford University Press, USA. p. 57. ISBN 967-65-3049-2.
^ Bala, Bilcher (2005). Thalassocracy: A History of the Medieval Sultanate of Brunei Darussalam. p. 160. ISBN 9789832643746.{{cite book}}: CS1 maint: date and year (link)

[Saunders_1994_p.-1] Saunders, Graham E. (1994). A History of Brunei. Oxford University Press, USA. p. 55. ISBN 967-65-3049-2.

[Saunders_1994-2] Saunders, Graham E. (1994). A History of Brunei. Oxford University Press, USA. p. 57. ISBN 967-65-3049-2.

[3] Bala, Bilcher (2005). Thalassocracy: A History of the Medieval Sultanate of Brunei Darussalam. p. 160. ISBN 9789832643746.{{cite book}}: CS1 maint: date and year (link)

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