The Mighty First, Episode 2, The Children's War - The Mighty First series, #2

The drama continues as young Minerva struggles with trying to adapt in her transition from adventurous small-town girl to a reluctant leader. After Earth is plunged into an unprovoked war, and occupied by a brutal, power-hungry race of humanoid aliens, the 1st Global Marine Division is tasked with liberating our world. Comprised chiefly of teenage recruit graduates, the Mighty First will stop at nothing to accomplish their mission.
A futuristic tale with a WW2 vibe that follows Minerva and her cadre as they grow from high school seniors missing home, to the heroes that the Allied worlds are so depending on. Hold to your hope, the Mighty First is coming !