I am sure your children were not taught this in school. I wasn't. More scrubbing of history in compliance with the sharia.
Christopher Columbus on Santa Maria in 1492
Columbus and Islam Citizen warrior, October 14, 2013 (thanks to Jim)
In 1492, Columbus sailed the ocean blue. We all know the New World was discovered because Christopher Columbus was looking for a trade route to the East.
But was he looking for a trade route? Because during its second great jihad, Islam had invaded Central Asia and defeated Constantinople in 1453, cutting off the overland route for Europeans. Islamic armies continued their jihad northward, and conquered much of what is now Eastern Europe, until they were finally stopped at the gates of Vienna in 1529 (on September 11th).
Learn more about historical jihads here: Jihad Through History.
Learn more about the principles of jihad as they are still applied today.
Another way jihad helped create America: Thomas Jefferson's Quran.