Expeditionary Force by Craig Alanson Wiki
Expeditionary Force by Craig Alanson Wiki

Earth is the home planet of the Humans. At the start of the series (Columbus Day ) the Ruhar attacked the planet targeting its infrastructure and industry. Soon afterwards the Kristang 'save' the planet, making its native species their clients. 


Earth is the planet we live on. It is the third planet from the Sun. It is the only planet known to have life on it. The Earth formed around 4.5 billion years ago.

It is one of four rocky planets on the inside of the Solar System. The other three are Mercury, Venus, and Mars.

The Earth orbits Sol (the Sun) at average distance of 94.452 million miles or 152.006 million kilometers. Its seasons are caused by its tilt of 24 degrees from the plane of its orbit, rather then its elliptical orbit.

Milky Way 5600px Sq.jpg

Sol is located approximately 26,000 ly from the Galactic center of the Milky Way, in the Orion Spur (an offshoot of the Sagittarius Arm). The ecliptic plane (plane of the solar system) and the central Galactic plane (the plane of the disc of the Milky Way) are inclined to each other at an angle of 60.2 degrees. Sol currently about 65 ly above (or north of) the central Galactic plane (this is an approximation based n average from several different sources).

Events of Columbus Day 

At the start of the series the Ruhar attacked the planet targeting its infrastructure and industry. Soon afterwards the Kristang 'save' the Earth , making its native species their clients.[1]

The Kristang used the opportunity to make Space Elevator's on the Earth's surface, and to start to use the population and land to their own ends.

During the Kristang Occupation

Where groups of farmers tried to block the Kristang from occupying their land, they were been killed by maser strikes from orbit. The Kristang wanted all of Lake Superior and the Caspian Sea to grow the types of fish they ate. They planned to sterilize those entire massive lakes with powerful gamma rays, and set up their own biosphere in the water.

By the end of the Columbus Day novel, many of Earth's cities had been damaged by a Kristang Frigates orbital rail strikes in retaliation to humanities protests to poor treatment.

Mumbai was almost decimated by the orbital maser network.

Notable Features

The Kristang constructed the Space Elevator at Ecuador with plans to construct more. There are also seventeen defensive maser satellites in orbit around the planet.[2]

"Each satellite is fifty eight meters long, powered by a fusion reactor which can generate eight hundred twenty megawatts of maser power."[3] 

-Skippy to Joe.


  1. ExForce 1: Columbus Day
  2. ExForce 1: Columbus Day
  3. Alanson, Craig. Columbus Day (Expeditionary Force Book 1) (p. 257).