According to the Articles of Confederation, Congress had the right to manage foreign affairs. Congress also had the right to set up post offices.
Explanation:
The American legislative power, at the federal level, is exercised by the National Congress, composed of two Houses: the Federal Senate and the House of Representatives. The federal congress has many functions such as settling definitively on international treaties, agreements or acts that entail burdensome burdens or commitments to national heritage; to authorize the President of the Republic to declare war, to celebrate peace, to allow foreign forces to transit through or stay in the national territory, except in cases provided for in a complementary law; to stop the normative acts of the Executive Power that go beyond the regulatory power or the limits of legislative delegation; among others. According to the Articles of Confederation, Congress had the right to administer foreign affairs. Congress also had the right to create post offices.
Opposing sides were dug into trenches, which led to higher casualties and poor conditions for soldiers but they could rarely advance because of improved technologies such as machine guns which gave a tactical advantage to defensive forces and artillery.
