Only eleven, and they lost their rebellion while the men fighting four score and seven years earlier won theirs.
Except for one thing. It cannot be "Rebellion" when it is a right guaranteed by the founding document of the nation.
Yes, Lincoln declared it to be a rebellion, because he rejected the idea that states had a right to secede, even though he acknowledged this idea quite clearly in 1848, and again he acknowledged this right in 1852.
It was only when he saw the states leaving his government that he flip flopped into claiming independence was illegal, even though the vast pile of evidence in prior US history demonstrates that he was wrong.
So Lincoln repeatedly called this legal move to separate a "Rebellion" when it was not, and all his yes men sycophants simply repeated this claim endlessly, and eventually this propaganda became accepted wisdom and remains so to this day.
It still isn't true, but most people believe it to be true, so you are just pushing back against the tide trying to change this long held but incorrect claim of Southern "Rebellion."
And yes, the force of 20 million beat the force of 5 million who were fighting for their homeland, and even then just barely.