This video will touch on how turns on the campaign map work and how to navigate them.

Time is advanced in the form of turns in the campaign map, click the End Turn button to progress the game onwards. Once your turn has ended, other factions will take their own turns in which they can move armies and recruit units, etc. The number of your current turn can be seen on the bottom right, underneath the End Turn button. The game will automatically save each turn and can be saved manually during your turn, except on Legendary difficulty, so choose wisely! If you decide to load up an old save, simply go to the game options from either the main menu or within a campaign. This is useful if you make a tactical error and want to try again. To take it one step further, simply press CTRL + S within a campaign game to quickly save, or CTRL + L to quickly load the last saved game.