Subcategories - Kings, Queens, Kingdoms, Monarchy
- Abdication of Charles V
- Accession of Frederick the Great
- Act of Settlement
- Act of Supremacy
- Aetius
- Afonso I
- Agesilaus II of Sparta
- Akbar
- Akhenaton
- Alaric
- Alboin
- Alcuin Becomes Adviser to Charlemagne
- Alexander the Great
- Alexander the Great Begins Expansion of Macedonia
- Alexander the Great Invades the Indian Subcontinent
- Alfonso VIII
- Alfonso X
- Alfred the Great
- Alp Arslan
- Amenhotep III
- Anawrahta
- Anglo-Irish War
- Anglo-Scottish Wars of 1290-1388
- Anglo-Scottish Wars of 1513-1560
- Anne Boleyn
- Antigonus I Monophthalmos
- Antiochus the Great
- Ardashīr I Establishes the Sāsānian Empire
- Arsinoe II Philadelphus
- Artemisia I
- Ashurbanipal
- Ashurnasirpal II
- Aśoka
- Atossa
- The Austrian Ausgleich
- Baptism of Clovis
- Barons’ War
- Bathsheba
- Battle of Bannockburn
- Battle of Blenheim
- Battle of Bosworth
- Battle of Boyne
- Battle of Kadesh
- Battle of Marston Moor
- Battle of Megiddo, 1469 b.c.e.
- Battle of Naseby
- Battle of Preston
- Battle of Tewkesbury
- Battle of Towton
- Battle of Worcester
