The second Union Jack was Brian Falsworth, son of the original Union Jack (see above). After Brian had left home to go to German, where he supported Britain's appeasement of Hitler, he became horrified when he discovered the Nazi's atrocities. He and his friend Roger Aubrey tried to leave the country, but German officials wouldn't let the good publicity Falsworth's support generated be undone. They threw Brian Falsworth into a prison, where he discovered that his cellmate was a scientist that had developed a formula similar to the Super-Soldier Serum which gave Captain America his strength. Not wanting the Nazis to have his formula, the scientist had Brian drink it. He instantly became stronger, and escaped from the Nazi prison. He became the costumed champion the Destroyer, and fought the Germans on their own turf.