Rapprochement (noun)

1. The reestablishment of cordial relations, especially between countries that have been at odds.
2. The process of coming closer together, especially in a political or diplomatic context.

Origin:

Late 19th century: french, from rapprocher 'bring together'.

Examples:

1. The rapprochement between the United States and Cuba is one of the Obama Administration's most significant foreign policy accomplishments.
2. The two nations have been able to achieve a rapprochement after years of political tension.
3. The recent rapprochement between North Korea and South Korea has been greeted with optimism by many in the international community.
4. The signing of a peace agreement marked the end of hostilities and the start of a rapprochement between the two nations.
5. The rapprochement between France and Germany was an important step in the development of the European Union.