Alternative history or alternate history is fiction that is set in a world in which history has diverged from history as it is generally known; or simply put: "What If?".
This is one reason we have the What-If section here on Wordtrip... to get you thinking about what would happen if different circumstances were placed upon a person or group of people. Please visit our What-If Wednesday Forum and see what we're talking about. Go HERE and take up the challenge!
Also... I really liked this link, which gives a Today in Alternate History. Here's an example for today March 30th, 2005. Go HERE
in 1870, rebels in Texas fight off efforts to rejoin the United States. Even with all of their Confederate allies back in the Union, the newly reformed Texas Republic remained independent and refused the amnesty offered by President Grant if they would just surrender and merge back with America. Texas eventually ran out of the ability to resist, and was conquered and absorbed back into the U.S. in 1886.