Table of Contents:

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Chapter 1

: Introduction
1. Background of the Study
2. Statement of the Problem
3. Research Objectives
4. Research Questions
5. Significance of the Study
6. Scope and Limitations
7. Definition of Terms

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Chapter 2

: Literature Review
1. Origins and Ideals of European Integration
2. Milestones in European Integration: From the Treaty of Rome to the Maastricht Treaty
3. Enlargement of the European Union: Expansion and Integration Challenges
4. The Evolution of European Institutions: From the European Coal and Steel Community to the European Commission
5. Challenges and Crises in European Integration: From the Eurozone Crisis to Brexit

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Chapter 3

: Research Methodology
1. Research Design
2. Study Setting and Participants
3. Data Collection Methods
4. Data Analysis Techniques
5. Ethical Considerations
6. Trustworthiness and Rigor

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Chapter 4

: Results
1. Historical Analysis of European Integration Milestones
2. Examination of Challenges and Crises in European Integration
3. Impact of Brexit on European Unity and Integration

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Chapter 5

: Discussion
1. Comparison of Findings with Existing Literature
2. Interpretation of Results in Relation to European Integration Theories
3. Implications for the Future of European Union
4. Recommendations for Strengthening European Integration in the Post-Brexit Era