View source for AD 101

=== By place ===
==== Roman Empire ====
* [[Trajan]] begins his fourth consulship.<ref name=leglay>{{cite book | title=A History of Rome | edition=Second | first1=Marcel | last1=LeGlay | first2=Jean-Louis | last2=Voisin | first3=Yann | last3=Le Bohec | page=271 | publisher=Blackwell | place=Malden, Massachusetts | year=2001 | isbn=0-631-21858-0}}</ref>
* Emperor Trajan starts an expedition against [[Dacia]],<ref name=leglay/> exceeding the limits of the [[Roman Empire]] set by [[Augustus]].<ref name="Romanis REquote05">{{cite web|url=http://www.roman-emperors.org/assobd.htm#t-inx|title=De Imperatoribus Romanis|website=An Online Encyclopedia of Roman Emperors|access-date=8 November 2007|quote=Because the Dacians represented an obstacle against Roman expansion in the east, in the year 101 the emperor Trajan decided to begin a new campaign against them. The first war began on 25 March 101 and the Roman troops, consisting of four principal legions (X Gemina, XI Claudia, II Traiana Fortis, and XXX Ulpia Victrix), defeated the Dacians.}}</ref>
* [[Third Battle of Tapae]]: Roman forces, led by Trajan, defeat the Dacian king [[Decebalus]] in [[Transylvania]].<ref name="Romanis REquote03">{{cite web|title=Battle of Sarmizegetusa (Sarmizegetuza), A.D. 105: De Imperatoribus Romanis|url=http://www.roman-emperors.org/assobd.htm#t-inx|website=An Online Encyclopedia of Roman Emperors|access-date=8 November 2007|quote=Although the Dacians had been defeated, the emperor postponed the final siege for the conquering of Sarmizegetuza because his armies needed reorganization. Trajan imposed on the Dacians very hard peace conditions: [[Decebalus]] had to renounce claim to part of his kingdom, including the Banat, Tara Hategului, Oltenia, and Muntenia in the area south-west of Transylvania. He had also to surrender all the Roman deserters and all his war machines. At Rome, Trajan was received as a winner and he took the name of Dacicus, a title that appears on his coinage of this period. At the beginning of the year 103 A.D., there were minted coins with the inscription: IMP NERVA TRAIANVS AVG GER DACICVS.}}</ref><ref name="ReferenceD">{{cite book |last=Jackson |first=Nicholas |chapter=First Dacian War |title=Trajan: Rome's Last Conqueror |publisher=GreenHill Books |location=UK |edition=1st |date=2022 |isbn=978-1784387075}}</ref>