if there is only one government how will it provide security to the distant regions?

Answer 1

I think I understand the question, but I wonder what you mean by "distant regions." You mean distant from the Capito City?

If so, why should there be a problem? How does the government in Washingtom provide security to the distant region of Los Angeles? Or Hawaii, for example.

How does the government in Paris provide security for Tahiti?

The answer to your question might be that the government provides the fund for the distant regions to provide for some of their own security. Local taxes would probably pay for the rest of the security and safety of the area.

It brings to my mind another question. If there were one government, what kind of threat to security do you envision?

Answer 2

According to the theory of separation of powers, every government consists of the executive, the legislature and the judiciary. The whole territory is divided into many regions in order to enfore law and administer smoothly. Security can be provided through regional forces having control in the hands of regional governments or federal government according to the provisions of the constitution of the country. No problem would arise for providing security when the administration is strong.