According to a 2011 report, international mail between China and Russia normally travels through Beijing and Moscow.
During the war, communication from the southern battlefields was difficult and dangerous, and mail from soldiers did not routinely travel north.
That's a rough analogy of how mail travels over the Internet.
Its varied history includes the Mulhollen Station, through which mail traveled with the Butterfield Stage Line in 1858.
The mails travelled the same routes as for the Egyptian Campaign of 1882.
International mail for Northern Cyprus travels via Turkey.
Commerce and the mail soon traveled much faster on what was called the Chicago Road.
The station building still serves as a postal distribution point, but the mail travels from Inverness by road.
The word ZIP was chosen to suggest that the mail travels more efficiently, and more quickly, when senders use it.
The mail travels free.