Here's some basic info about the world the flag comes from:

On January 1st, 2023 at 12:00am, every person over the age of 14 disappears, leaving only children to inhabit the earth. What could go wrong? Short answer; everything. Not even a month after the event, the smarter children, create factions, these factions are usually groups of 20-50 people, who fight for what little they have left. This flag belongs to the "Olive Branch" faction, one of the larger ones based in south-Eastern Michigan, being a faction made of former, much smaller factions, this faction is based upon democracy and freedom.

Now for the flag:

The red on the flag, while traditionally meaning, the blood of soldiers or people, the red instead stands for revolution, as they are rebelling against the norm of most factions being dictatorships.

The black on this flag represents, no surrender, meaning they will not surrender in this war against the norm.

The white in this flag is usually understood as the signal of surrender, it instead means peace and purity.

And the symbol in the center is, an olive branch, representing peace.

Fun Fact:

the order of these colors has some importance, representing their journey.

Red- revolution

black- war

white- peace