Add BCE temporal tags to all documents; add temporal-dating steering doc

rulers/alexander-the-great.md

@@ -4,21 +4,21 @@
 # Alexander the Great
 
 ## Overview
-Alexander III of Macedon (356–323 BCE), known as Alexander the Great, conquered the Persian Empire and created one of the largest empires in ancient history, spreading Greek culture from Egypt to India.
+Alexander III of Macedon (356–323 BCE), known as Alexander the Great, conquered the Persian Empire and created one of the largest empires in ancient history, spreading Greek culture from Egypt to India. @t[356 BCE..323 BCE]
 
 ## Key Facts
-- Born: 356 BCE, Pella, Macedon
-- Died: 323 BCE, Babylon (age 32)
-- Reign: 336–323 BCE
+- Born: 356 BCE, Pella, Macedon @t[=356 BCE]
+- Died: 323 BCE, Babylon (age 32) @t[=323 BCE]
+- Reign: 336–323 BCE @t[336 BCE..323 BCE]
 - Father: Philip II of Macedon
 - Tutor: Aristotle
 
 ## Major Campaigns
-- Battle of Granicus (334 BCE): First victory against Persia in Anatolia
-- Battle of Issus (333 BCE): Defeated Darius III
-- Siege of Tyre (332 BCE): Seven-month siege of the island city
-- Battle of Gaugamela (331 BCE): Decisive defeat of the Persian Empire [^1]
-- Indian campaign (327–325 BCE): Defeated King Porus at the Hydaspes
+- Battle of Granicus (334 BCE): First victory against Persia in Anatolia @t[=334 BCE]
+- Battle of Issus (333 BCE): Defeated Darius III @t[=333 BCE]
+- Siege of Tyre (332 BCE): Seven-month siege of the island city @t[=332 BCE]
+- Battle of Gaugamela (331 BCE): Decisive defeat of the Persian Empire @t[=331 BCE] [^1]
+- Indian campaign (327–325 BCE): Defeated King Porus at the Hydaspes @t[327 BCE..325 BCE]
 
 ## Legacy
 - Founded over 20 cities, most notably Alexandria in Egypt