Ancient history

Why did the janissaries refuse to use modern weapons?

This is not a correct statement. The Janissaries were one of the most advanced and well-equipped military forces in the world during their time, and they did not refuse to use modern weapons. They were famously known for their use of firearms, including muskets, cannons, and other artillery. They were also skilled in using other advanced military technology such as siege engines, engineering tools, and naval vessels.