Answer:
According to the text with other clues such as the flashy stars & stripes they are wearing, this character is the US government. They are ignoring the Americans, shown by them looking away, playing an instrument, and waking away.
<span>The
breakdown of old alliances among European powers and an arms race led
by Germany helped set the stage for the conflict, which was sparked by
the assassination of Archduke Ferdinand of Austria on June 28, 1914.</span>