You place all 25 cards on one timeline, one at a time. You start with three lives, and ten right in a row wins a lost one back.
AP European History is a free timeline game you can play right in your browser, with no sign-up and nothing to install. Every card hides a value on the same scale, release years and dates, so the whole run is really one big sorting puzzle. The first card comes up face up. After that you slot each new card into the spot where you think it belongs, and its value only shows once it lands. A wrong guess costs one of your three lives, ten right in a row wins one back, and the run ends with whatever you had down when the last life goes.
Want a longer game? On the deck tree you can tick this deck alongside any other one measured in release years and dates, and they shuffle into a single timeline together.
Here are 25 of the 25 cards you might be dealt. Their values stay hidden until you place them.