CB#1 meaning in General ?

"Cabinet Battle #1" & "Cabinet Battle #2" are songs written for Act II of the musical Hamilton, based on the life of Alexander Hamilton, which premiered on Broadway in 2015. Lin-Manuel Miranda wrote both the music and lyrics to the songs.

The songs portray discussions in the cabinet of the administration of George Washington (played by Christopher Jackson in the original cast) in the style of rap battles between Secretary of the Treasury Alexander Hamilton (Lin-Manuel Miranda) and U.S. Secretary of State Thomas Jefferson (Daveed Diggs), with U.S. Representative James Madison (Okieriete Onaodowan) occasionally assisting Jefferson. The Cabinet battles, which include the anachronistic use of microphones, were influenced by the rap battles that appear in the film 8 Mile.

"Cabinet Battle #1" and "Cabinet Battle #2" were performed in the stage version of the musical. "Cabinet Battle #3" was cut from the final version, but Lin-Manuel Miranda's demo track of that song was ultimately released on The Hamilton Mixtape.

According to the credits of the 2020 filmed version of Hamilton, "Cabinet Battle #1" contains elements of "The Message" by Grandmaster Flash and the Furious Five, while "Cabinet Battle #2" contains elements of "(It's All Good)" by The Notorious B.I.G.. The songwriters of those songs officially share credit on these songs, also per the credits of the film.