Obey Jesus.
My obedience
Is my praise
If they did not obey Jesus,
then they would not be the firstfruits,
the firstclass most faithful Apocalyptic virgin saints,
as they are called in that same verse,
and also knowing what happens to the children of the whore of Babylon,
in verse 12, that we will patiently wait for and see with our own eyes.
I perceive a theme in your wondering of the Bible,
there are indeed numerous links,
between Joel 2, Isaiah 13, and Revelation 14.
I won't spoil the story for you, but the climax of the entirety of this battle, the Bible taken as a whole,
and even the entirety of the universe and physical reality, the creation and all history,
it is even written in Revelation 20.
I suppose I could tease
and ask coy questions like clickbait,
"what side will win?" "the winner of this battle will shock you read below!"
but we all know it will be our King, the mighty Lamb.
The battle will not even be close.
Yea, it will be a very one-sided win.
Praise Jesus.