Reducing or removing alliances or embassies is the definition of the sanction of

Diplomacy.

Diplomatic sanctions are issued by countries or by the United Nations. These sanctions trigger the reduction or removal of diplomatic ties, such as embassies and consulates. The severance of diplomatic relations is one of the measures contained in Article 41 of the UN Charter, and have historically been one of the most frequently used sanctions.

b. the 200th birthday of the united states