(ANSA) - BELGRADE, MAY 9 - French President Emmanuel Macron and Polish Prime Minister Donald Tusk will sign a friendship treaty today in Nancy, eastern France, to strengthen their partnership, demonstrating Poland's growing weight in Europe as a key country on Russia's eastern border. The treaty, which is intended to "change things," particularly in the realm of security and defence, will be signed by the two leaders at 12:45, as Tusk confirmed. "The objective," as stated by the French presidency, "is to fortify our bilateral partnership and consecrate Franco-Polish friendship in the areas of energy, infrastructure, defence, and security, among other sectors." (ANSA).