Comprising of nine states, EU9 has become a vital component of the European Union (EU). The EU9 joined the EU in its 3rd growth phase in 2004, injecting new ideas and cultural diversity into the EU society.

The EU9 nations include Hungary, Slovenia, Latvia, Lithuania, Poland, Estonia, Slovakia, Czech Republic, and Malta. These states each have made significant efforts towards enhancing the objectives of the European Union.

In this respect, comprehending the role EU9 has in the European Union is necessary for any study relating to international relations, politics, or European economics.

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

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

The cultural contribution of the EU9 is also significant. These states bring deep historical backgrounds, unique cultural practices, and diverse languages, therefore enhancing the plurality of the EU.

The addition of EU9 has also impacted the internal politics within the EU. With their presence, the power dynamics have shifted, with new coalitions and alliances developing.

In conclusion, the contributions played by the EU9 nations are significant. From economic influence to cultural richness, and from security strategies to political dynamics, EU9 has strengthened the European Union's core strength. As such, an in-depth understanding of the EU9 is vital to fully grasping the complexities of the European Union.