Syria's civil war enters a fourth year Saturday, with at least 146,000 people dead, millions more homeless, cities and historical treasures in ruins, the eco**my devastated and ** end in sight. On March 15, 2011, just weeks after popular uprisings toppled dictators in Tunisia and Egypt, protests erupted in Syria's southern city of Daraa after teenagers were arrested over anti-regime graffiti. President Bashar al-Assad's regime reacted forcefully, and people began to die. Civilians took up arms, soldiers began to desert and an insurgency became full-scale civil war after the regime bombed the central city of Homs in February 2012.