Spanish–Algerian War (1775–1785)

Spanish–Algerian War
	Part of the Spanish–Barbary wars
	; Bombardment of Algiers (1784)
Date	1775–1785
Location	Algeria and the Mediterranean Sea
Result	Treaty of Algiers
Belligerents
Kingdom of Spain	Regency of Algiers
Commanders and leaders
Charles III; Alejandro O'Reilly; Antonio Barceló	Muhammad V
Strength
1775:; 20,000 men; 7 ships of the line ; 12 frigates ; 27 gunboats ; 5 hulks ; 9 feluccas ; 4 mortar boats ; 7 galleys ; 3 smaller warships; 230 transports; 1783:; 76 ships; 1784:; 9 ships of the line ; 11 frigates ; 14 xebecs ; 90 smaller warships	Total:; 4,000 Janissaries; 15,000 camelry; 14,000 infantry; 2 demi-galleys; 2 xebecs; 6 gunboats; 1 felucca; 70 galliots, gunboats, and other minor ships
Casualties and losses
5,000 dead; 2,000 wounded;	300 dead (1775); Unknown total deaths; 65 galiots and gunboats destroyed

The Spanish–Algerian War was a conflict between the Spanish Empire and the Regency of Algiers from 1775 to 1785.

An attempted peace treaty in 1766 resulted only in an exchange of captives captured in Barbary corsair attacks. Spain officially declared war in 1775, launching an ill-fated invasion led by Alejandro O'Reilly that was repelled with significant losses. Algerian privateering increased post-invasion, and Spain's attempts at peace through diplomacy with despite the support of the Ottoman Empire.

Two separate bombardments of Algiers by Rear admiral Antonio Barceló in 1783 and 1784 inflicted limited damage, but succeeded to open negotiations. The war concluded in 1785 with a treaty that required Spain to pay 700,000 pesos in exchange for ending piracy against Spain, although hostilities would return a generation later.