Spain declares war on Morocco.

The Hispano-Moroccan War, also known as the Spanish–Moroccan War, the First Moroccan War, the Tetuán War, or, in Spain, as the War of Africa, was fought from Spain's declaration of war on Morocco on 22 October 1859 until the Treaty of Wad-Ras on 26 April 1860. It began with a conflict over the borders of the Spanish city of Ceuta and was fought in northern Morocco. Morocco sued for peace after the Spanish victory at the Battle of Tetuán.

Morocco, officially the Kingdom of Morocco, is a country in the Maghreb region of North Africa. It has coastlines on the Mediterranean Sea to the north and the Atlantic Ocean to the west, and has land borders with Algeria to the east, and the disputed territory of Western Sahara to the south, occupied by Morocco since 1975. Morocco also claims the Spanish exclaves of Ceuta, Melilla and Peñón de Vélez de la Gomera, and several small Spanish-controlled islands off its coast. It has a population of approximately 37 million. Islam is both the official and predominant religion, while Arabic and Berber are the official languages. Additionally, French and the Moroccan dialect of Arabic are widely spoken. The culture of Morocco is a mix of Arab, Berber, African and European cultures. Its capital is Rabat, while its largest city is Casablanca.

October 22 is the 295th day of the year in the Gregorian calendar; 70 days remain until the end of the year.