Match the EU expansion round with its year and key motive:
First Enlargement ↔️ 1973: Economic integration
Southern Expansion ↔️ 1981, 1986: Strengthen democracy
Cold War End ↔️ 1995: Security alignment
Eastern Enlargement ↔️ 2004, 2007: Economic development
Croatia Joins ↔️ 2013: Regional stability