April 22 in History

Basil II Porphyrogenitus, given the epithet the Bulgar Slayer, was the senior Byzantine emperor from 976 to 1025. He and his brother Constantine VIII were crowned before their father Romanos II died in 963, but they were too young to rule. The throne thus went to two generals, Nikephoros Phokas and John Tzimiskes before Basil became senior emperor, though his influential great-uncle Basil Lekapenos remained as the de facto ruler until 985. His reign of 49 years and 11 months was the longest of any Roman emperor.

Pedro Álvares Cabral was a Portuguese nobleman, military commander, navigator and explorer regarded as the European discoverer of Brazil. He was the first human in history to ever be on four continents, uniting all of them in his famous voyage of 1500, where he also conducted the first substantial exploration of the northeast coast of South America and claimed it for Portugal. While details of Cabral's early life remain unclear, it is known that he came from a minor noble family and received a good education. He was appointed to head an expedition to India in 1500, following Vasco da Gama's newly opened route around Africa. The undertaking had the aim of returning with valuable spices and of establishing trade relations in India—bypassing the monopoly on the spice trade then in the hands of Arab, Turkish and Italian merchants. Although the previous expedition of Vasco da Gama to India, on its sea route, had recorded signs of land west of the southern Atlantic Ocean, Cabral led the first known expedition to have touched four continents: Europe, Africa, South America, and Asia.

The Treaty of Zaragoza or Saragossa, also called the Capitulation of Zaragoza or Saragossa, was a peace treaty between Castile and Portugal, signed on 22 April 1529 by King John III of Portugal and the Habsburg Emperor Charles V in the Aragonese city of Zaragoza. The treaty defined the areas of Castilian and Portuguese influence in Asia in order to resolve the "Moluccas issue", which had arisen because both kingdoms claimed the lucrative Spice Islands for themselves, asserting that they were within their area of influence as specified in 1494 by the Treaty of Tordesillas. The conflict began in 1520, when expeditions from both kingdoms reached the Pacific Ocean, because no agreed meridian of longitude had been established in the far east.

The Texas Revolution was a rebellion by Anglo-American immigrants as well as Hispanic Texans against the centralist government of Mexico in the Mexican state of Coahuila y Tejas. The uprising was part of a larger revolt against the Centralist Republic of Mexico that included other provinces opposed to the regime of President Antonio López de Santa Anna. The Mexican Congress passed the Tornel Decree, declaring that any foreigners fighting against Mexican troops "will be deemed pirates and dealt with as such, being citizens of no nation presently at war with the Republic and fighting under no recognized flag". Only the province of Texas succeeded in breaking with Mexico, establishing the Republic of Texas. It was eventually annexed by the United States about a decade later.

The National League of Professional Baseball Clubs, known simply as the National League (NL), is the older of two leagues constituting Major League Baseball (MLB) in the United States and Canada, and the world's oldest extant professional team sports league. Founded on February 2, 1876, to replace the National Association of Professional Base Ball Players (NAPBBP) of 1871–1875, the NL is sometimes called the Senior Circuit, in contrast to MLB's other league, the American League, which was founded 25 years later and is called the "Junior Circuit". Each league has 15 teams.