No Roman Empire. No Mongols. No ancient Chinese dynasties or early Indian states. And you can forget about the Incan and Aztec empires before the Europeans dropped their anchors.

That’s a sample of what would be missing from the Advanced Placement World History exam if the College Board, the nonprofit organization that owns the A.P. program, follows through with a plan to start the test material at the year 1450.

The board’s announcement last month that it would drastically revise the test prompted a swift backlash from history educators across the country, many who assert that the move would turn the course into a meditation on the rise of the West.

“They couldn’t have picked a more Eurocentric date,” said Merry E. Wiesner-Hanks, president of the World History Association and a former developer of the exam and course.