The Gulf, Mobile and Ohio was a Class I railroad

Class I railroad

A Class I railroad in the United States and Mexico, or a Class I rail carrier in Canada, is a large freight railroad company, as classified based on operating revenue.Smaller railroads are classified as Class II and Class III...

 in the central United States

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

 whose primary routes extended from Mobile, Alabama

Mobile, Alabama

Mobile is the third most populous city in the Southern US state of Alabama and is the county seat of Mobile County. It is located on the Mobile River and the central Gulf Coast of the United States. The population within the city limits was 195,111 during the 2010 census. It is the largest...

, and New Orleans, Louisiana

New Orleans, Louisiana

New Orleans is a major United States port and the largest city and metropolitan area in the state of Louisiana. The New Orleans metropolitan area has a population of 1,235,650 as of 2009, the 46th largest in the USA. The New Orleans – Metairie – Bogalusa combined statistical area has a population...

, to St. Louis

St. Louis, Missouri

St. Louis is an independent city on the eastern border of Missouri, United States. With a population of 319,294, it was the 58th-largest U.S. city at the 2010 U.S. Census. The Greater St...

 and Kansas City, Missouri

Kansas City, Missouri

Kansas City, Missouri is the largest city in the U.S. state of Missouri and is the anchor city of the Kansas City Metropolitan Area, the second largest metropolitan area in Missouri. It encompasses in parts of Jackson, Clay, Cass, and Platte counties...

, as well as Chicago, Illinois.

From its two parallel lines through eastern Mississippi

Mississippi

Mississippi is a U.S. state located in the Southern United States. Jackson is the state capital and largest city. The name of the state derives from the Mississippi River, which flows along its western boundary, whose name comes from the Ojibwe word misi-ziibi...

, the GM&O also served Montgomery

Montgomery, Alabama

Montgomery is the capital of the U.S. state of Alabama, and is the county seat of Montgomery County. It is located on the Alabama River southeast of the center of the state, in the Gulf Coastal Plain. As of the 2010 census, Montgomery had a population of 205,764 making it the second-largest city...

 and Birmingham, Alabama

Birmingham, Alabama

Birmingham is the largest city in Alabama. The city is the county seat of Jefferson County. According to the 2010 United States Census, Birmingham had a population of 212,237. The Birmingham-Hoover Metropolitan Area, in estimate by the U.S...

, as well as Memphis, Tennessee

Memphis, Tennessee

Memphis is a city in the southwestern corner of the U.S. state of Tennessee, and the county seat of Shelby County. The city is located on the 4th Chickasaw Bluff, south of the confluence of the Wolf and Mississippi rivers....

.
The Gulf, Mobile and Northern Railroad

Gulf, Mobile and Northern Railroad

The Gulf, Mobile and Northern Railroad was a railroad in the Southern United States. The first World War had forced government operation upon the company; and in 1919, when it became once more a free agent, it chose Ike Tigrett to charter its new course...

 was created as the reorganization of the New Orleans, Mobile and Chicago Railroad in 1917. The GM&O was incorporated in 1938 to merge the Gulf, Mobile and Northern Railroad and the Mobile and Ohio Railroad

Mobile and Ohio Railroad

The Mobile and Ohio Railroad was a railroad in the Southern U.S. The M&O was chartered in January and February 1848 by the states of Alabama, Kentucky, Mississippi, and Tennessee. It was planned to span the distance between the seaport of Mobile, Alabama and the Ohio River near Cairo, Illinois...

, which was accomplished in 1940.