Final answer:
Butterfield's Lullaby is known as Taps today.
Step-by-step explanation:
The melody known as Butterfield's Lullaby is today commonly known as Taps. Taps is a bugle call that is traditionally played at military funerals and is also used to signal the end of the day on military installations. It is a hauntingly beautiful tune that is played to honor fallen soldiers and to signify the end of the day.