Editing 1580 (section)

=== October&ndash;December ===
* [[October 4]] &ndash; [[Lorenzo Suárez de Mendoza, 5th Count of Coruña|Lorenzo Suárez de Mendoza]], the Spanish Count of Coruña, arrives in Mexico City to take office as the [[Viceroy of New Spain]], administering Mexico and Central America on behalf of King Philip II.<ref>Fernando Orozco Linares, ''Gobernantes de México'' (Panorama Editorial, 1985)</ref>
* [[October 15]] (5th waning of Tazaungmon 942 ME) &ndash; [[Bayinnaung|King Bayinnaung]] of Bruma dispatches a naval force of 200 ships and 8,000 soldiers to invade the [[Kingdom of Mrauk U]] (now in the Rakhine State of Myanmar), but the attempt fails after a year. Burmese troops are ordered withdrawn after Bayinnaung dies and is succeeded by his son [[Nanda Bayin]].<ref>''Maha Yazawin'', Vol. 3 (Ya-Pyei Publishing, 2006) p.71</ref>
* [[October 18]] &ndash; The [[Siege of Steenwijk (1580–1581)|Siege of Steenwijk]] in the Dutch Republic is started by the Spanish Netherlands. The siege will last four months and the Spanish troops will capture Steenwijk on February 23.
* [[October 24]] &ndash; The [[War of the Portuguese Succession]] comes to an end as Spanish forces crush the final Portuguese resistance in the last stronghold in mainland Portugal, [[Porto, Portugal|Porto]]. For the next 60 years, Portugal will be ruled by the Kings of Spain.
* [[November 10]] &ndash; [[Second Desmond Rebellion]]: The [[Siege of Smerwick]] (now Ard na Caithne in County Kerry, Ireland) ends after three days when their commander surrenders to the English. Members of a group of at least 400 freelance soldiers, and perhaps as many as 700, for the [[Papal States]] are summarily executed on orders of the English Lord Deputy of Ireland, [[Arthur Grey, 14th Baron Grey de Wilton|Baron Grey de Wilton]].<ref>Tony Pollard and Iain Banks, ''Scorched Earth: Studies in the Archaeology of Conflict'' (Brill, 2007) p.222</ref>
* [[December 31]] &ndash; [[James Douglas, 4th Earl of Morton]], formerly the regent for King James VI of Scotland, is arrested during a meeting of Scotland's Privy Council at [[Holyrood, Edinburgh|Holyrood]] on the accusation of [[James Stewart, Earl of Arran]] that the Earl of Morton had participated in the 1567 murder of Lord Darnley, husband of Mary, Queen of Scots and father of King James.<ref>George R. Hewitt, ''Scotland under Morton 1572-80'' (John Donald Publishing, 1982), pp.76-77</ref> Morton is taken to [[Dumbarton Castle]] and convicted of conspiracy to murder, and executed on June 2.