5. Greek-Turkish Tensions over Cyprus (1974)
In 1974, NATO faced a significant challenge when Turkey invaded Cyprus following a Greek-backed coup aimed at uniting the island with Greece. This military intervention led to the occupation of approximately 37% of Cyprus by Turkish forces. The alliance struggled to mediate the conflict, as Greece and Turkey, both NATO members, found themselves on opposing sides. The crisis strained intra-alliance trust and highlighted the complexities of managing conflicts within the alliance (cfr.org).
