What was the requirement for a territory to be able to apply for admission to the nation as a new state?

The requirement for a territory to apply for admission to the nation as a new state is outlined in the United States Constitution. Specifically, Article IV, Section 3, Clause 1 of the constitution states that "New States may be admitted by the Congress into this Union."

According to this clause, the power to admit new states rests with the United States Congress. However, the constitution does not explicitly state the specific requirements that a territory must meet in order to apply for statehood. The admittance of new states is largely a political process, with Congress having the authority to determine the terms and conditions for admission.

Historically, the general process has involved the territory's residents forming a state government, adopting a state constitution, and then submitting a formal application for statehood to Congress. The territory's population, economic viability, political stability, and cultural compatibility with the existing states are often considered in the decision-making process. Additionally, Congress may also take into account the political dynamics and interests of existing states when deciding to admit a new state.