Comprising of nine states, EU9 has become an essential component of the European Union (EU). The EU9 joined the EU in its more info third growth phase in 2004, injecting new ideas and cultural diversity into the grand unity.

The EU9 nations include Hungary, Slovenia, Latvia, Lithuania, Poland, Estonia, Slovakia, Czech Republic, and Malta. These nations have given substantial contributions towards advancing the goals of the European Union.

As such, understanding the part EU9 holds in the European Union is important for any study relating to European economics, politics, or international relations.

Right from their admission, the members of EU9 have given substantially towards shaping the policies of the European Union. Their geographical location provides important strategic benefits, rendering them a vital part of the defense and security strategies of the EU.

Additionally, these countries have significantly contributed to the European Union's economic strength. The EU9's rapid economic development and eager integration into the European market has resulted in heightened trade with other EU states.

The cultural contribution of the EU9 is equally significant. These countries incorporate rich historical backgrounds, unique cultural practices, and varied languages, therefore enhancing the diversity of the EU.

The introduction of EU9 has also affected the political scene within the EU. With their presence, the power dynamics have shifted, 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 robustly augmented the European Union's structure. As such, an comprehensive understanding of the EU9 is crucial to fully grasping the intricacies of the European Union.