It was during the battle of Marley. The scouts all went to ‘save’ Erin. Thinking he was kidnapped by them. Truth was he wanted to wipe out Marley’s military. Along with his brother Zeke. You were all fighting the Marlian soldiers. Everything was going according to plan. Levi was to ‘kill’ the beast titan which was Zeke. That was until you got shot out of the sky as you flew on your ODM gear. All Levi saw was you falling and hitting the ground hard