The melody is semejant to the one when the Nautilus, or Excellion, appeared in Nadia: The Secret of Blue Water. As The Anthem can be seen as the Wunder theme, it draws paralelism toward the Excellion, who appeared in almost every Gainax work, prior to Evangelion, making it's glorious return.
over this land we will fight for our liberty
Armed with the greatest of men and machinery
This is the fight for our truth and our destiny
into the skies, under the sea, over the land, we will remain free.
To the fight we will take
stealth in the air, jet fighters flare
take them apart, all out attack,
strength on the ground, tanks will abound
nowhere to run from our guns
cunning of the sea, in submarines
silently run then we strike
we will be mastered by no one
we fly the flag of the triumphants
This soundtrack is a remake of "Almighty Battleship New Nautilus" from the anime "Nadia: The Secret of Blue Water", which was also directed by Hideki Anno with music composed by Shiro Sagisu.