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

civilizations/maurya-empire.md

@@ -4,19 +4,19 @@
 # Maurya Empire
 
 ## Overview
-The Maurya Empire (~322–185 BCE) was the first empire to unify most of the Indian subcontinent, founded by Chandragupta Maurya and reaching its greatest extent under Ashoka.
+The Maurya Empire (~322–185 BCE) was the first empire to unify most of the Indian subcontinent, founded by Chandragupta Maurya and reaching its greatest extent under Ashoka. @t[322 BCE..185 BCE]
 
 ## Key Facts
 - Region: Indian subcontinent, from Afghanistan to Bengal
-- Period: ~322–185 BCE
+- Period: ~322–185 BCE @t[322 BCE..185 BCE]
 - Capital: Pataliputra (modern Patna)
 - Language: Prakrit, Sanskrit
 - Religion: Initially Vedic/Hindu, Buddhism promoted under Ashoka
 
 ## Notable Rulers
-- Chandragupta Maurya (~322–298 BCE): Founded the empire, defeated Seleucid forces [^1]
-- Bindusara (~298–272 BCE): Expanded southward
-- Ashoka (~268–232 BCE): Converted to Buddhism after the Kalinga War, erected edicts promoting dharma [^2]
+- Chandragupta Maurya (~322–298 BCE): Founded the empire, defeated Seleucid forces @t[322 BCE..298 BCE] [^1]
+- Bindusara (~298–272 BCE): Expanded southward @t[298 BCE..272 BCE]
+- Ashoka (~268–232 BCE): Converted to Buddhism after the Kalinga War, erected edicts promoting dharma @t[268 BCE..232 BCE] [^2]
 
 ## Achievements
 - Unified most of the Indian subcontinent for the first time
@@ -25,7 +25,7 @@ The Maurya Empire (~322–185 BCE) was the first empire to unify most of the Ind
 - Extensive road network and trade connections
 
 ## Decline
-Declined after Ashoka's death due to weak successors and regional fragmentation. Last Maurya ruler overthrown by Pushyamitra Shunga ~185 BCE.
+Declined after Ashoka's death due to weak successors and regional fragmentation. Last Maurya ruler overthrown by Pushyamitra Shunga ~185 BCE. @t[~185 BCE]
 
 ---
 [^1]: Thapar, R. *Aśoka and the Decline of the Mauryas* (Oxford, 1961)