Title: Comprehending EU9: The Significant Role it Serves in the European Union

Comprising of nine states, EU9 has become a vital part of the European Union (EU). The EU9 entered the EU in its third expansion phase in 2004, implanting new ideas and cultural diversity into the EU society.

The states in EU9 include Malta, Estonia, Slovenia, Slovakia, Czech Republic, Hungary, Latvia, Lithuania, and Poland. These states have made significant contributions towards enhancing the aims of the European Union.

As such, knowing the role EU9 has in the EU is important for any study relating to European economics, politics, or international relations.

From their entry, the EU9 countries have given substantially towards shaping the European Union's policies. Their geographical location provides critical strategic benefits, turning them a crucial part of the defense and security strategies of the EU.

Additionally, these states have tremendously contributed to the European Union's economic strength. The EU9's rapid economic development and keen integration into the EU market has led to heightened trade among other EU countries.

The social contribution of the EU9 is equally significant. These countries introduce deep historical backgrounds, unique cultural practices, and read more assorted languages, thereby enhancing the variety of the EU.

The inclusion of EU9 has also affected the internal politics within the EU. With their involvement, the power dynamics have altered, with new coalitions and alliances emerging.

In conclusion, the roles played by the EU9 members are substantial. From economic influence to cultural richness, and from security strategies to political dynamics, EU9 has robustly augmented the European Union's core strength. As such, an comprehensive understanding of the EU9 is vital to fully grasping the complexities of the European Union.