Comprising of nine states, EU9 has grown to be an integral part of the European Union (EU). The EU9 joined the EU in its 3rd enlargement phase in 2004, injecting new ideas and cultural diversity into the grand unity.

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

Therefore, knowing the role these nations holds in the European Union is required for any study relating to international relations, politics, or European economics.

Ever since their inclusion, the members of EU9 have added significantly towards shaping the policies of the European Union. Their geographical location provides vital strategic benefits, rendering them a crucial part of the EU's defense and security strategies.

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

The social contribution of the EU9 is also significant. These countries introduce deep historical backgrounds, unique cultural practices, and diverse more info languages, thus enhancing the plurality of the EU.

The inclusion of EU9 has also affected the political dynamics within the EU. With their involvement, the power dynamics have changed, with new coalitions and alliances forming.

In conclusion, the parts played by the EU9 nations are substantial. From economic influence to cultural richness, and from security strategies to political dynamics, EU9 has strengthened the European Union's structure. As such, an thorough understanding of the EU9 is vital to fully grasping the details of the European Union.