William R. Forstchen (born October 11, 1950) is an American author who has written in a variet of genres including ScienceFiction, Fantasy, AlternateHistory and Historical fiction.

His works include:
* ''The Lost Regiment'' series
* The ''Ice Prophet'' series
* The ''Star Voyager'' series
* The Gettysburg Trilogy (co-authored with Creator/NewtGingrich)
* The majority of the ''Wing Commander'' ExpandedUniverse novels
* A currently unnamed series focusing on the American Revolution, also co-written with Newt Gingrich. Current titles include ''To Try Men's Souls'' and ''Valley Forge''.
* ''One Second Later'', which is about the aftermath of the US being struck by a nuclear EMP, and its sequel ''One Year Later''.
* ''Day of Wrath'', about ISIL cells attacking several elementary schools across the US simultaneously.
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!!Works with their own trope pages include:

* ''Literature/TheLostRegiment'' series
* ''Literature/WingCommander'' series
* ''Literature/{{Arena}}''

!!Other works contain examples of:

* AfterTheEnd: ''One Second After'' is a CozyCatastrophe that begins with an EMP attack on the US and tells what happens in the following year.
* AlternateHistory:
** In the Gettysburg Trilogy, the Battle of Gettysburg went differently than in reality, with knock-on effects for the rest of the Civil War.
** In ''1945'', Germany stays out of the War in the Pacific and the US stays out of the War in Europe.
* ChinaTakesOverTheWorld: In ''One Second After'', China is one of the few nations to survive the EMP attack comparatively unscathed. The Chinese take over the Pacific Coast at the end of the novel, and are actually welcomed as heroes because they bring much needed food and medical supplies. Mexico is threatened by the Chinese military buildup in California, leading to rivalry.
* DividedStatesOfAmerica: By the end of ''One Second After'', the US has split into several parts. [[spoiler:China has taken over the West Coast, [[MexicoCalledTheyWantTexasBack Mexico has grabbed a large chunk of the South West]], the US Government controls the East Coast and the rest of the country is more or less up for grabs and in chaos.]]
* DysonSphere: The Gamester Wars series has a Dyson Sphere setting that's still being built--the {{Precursors}}' ancient robots have been at it for millions of years and it's still only half-complete, because of its size. There's also a RingWorldPlanet and other stellar-scale objects in the same universe.
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