Nintendo have unveiled some gameplay footage for the upcoming Fire Emblem: Three Houses at E3 2019.

Fire Emblem: Three Houses Gameplay - Nintendo Treehouse: Live | E3 2019

The game will also feature the ability to undo past mistakes with Divine Pulse:

Made a big mistake in battle and lost one of your favorite units? Activate Divine Pulse and undo a costly mistake in #FireEmblem: Three Houses! This powerful ability is limited, so use it wisely when the game launches on 7/26! #NintendoTreehouseLivehttp://E3.nintendo.com

 Jun 12, 2019

The main featuers of the game (according to the official website):

• The Officers Academy is home to three houses: The Black Eagles with house leader Edelgard, The Blue Lions with house leader Dimitri, and The Golden Deer with house leader Claude… Which house will you choose?
• As a professor, lead students in their academic lives and on the battlefield
• A turn-based, tactical RPG that puts new twists on strategic battling
• Freely roam Garreg Mach Monastery and interact with students in a variety of ways to bond with them. In the classroom, tutor your students to help them grow in the skill sets required to become specific classes
• Fortify your units with battalions for the first time, utilize new Combat Arts to strategize your moves, and also, face a new type of giant enemy—the Demonic Beasts