In Animal Farm, what is the importance of the song "Beasts of England"?

The song is initially
used as a tool to promote unity among the animals of Manor Farm, to inspire them and give them
an opportunity to give voice to the oppression they feel under the rule of Mr. Jones, the
farmer, and his family, people who exploit the animals' bodies and labor for their own gain.
After their successful rebellion, the song is sung to celebrate their new freedoms and encourage
them in their continued work, now for themselves rather than the lazy humans. However, it does
not take long after the rebellion against the humans for the three pigs who led the resistance
to begin to separate themselves from the rest of the animals. Afterrunsoff the farm, his motives
become more clear to the reader, if not the animals. Eventually, the song is outlawed, probably
to prevent the animals from realizing that they have simply traded oppression by the humans for
oppression by the pigs. In order to discourage an animal rebellion against the pigs, Napoleon
outlaws the song.