Why did women's rights groups separate after the passage of the 15th amendment?

Answer: After the Civil War, the women's suffrage movement split into two factions over the 15th Amendment ... They assumed that the rights of women would be championed alongside the rights of black men and they opposed the Amendment on the basis of women's exclusion.

It is a very long answer ... so ... here goes (a brainliest would be great!)

Explanation:

After the Civil War, the women's suffrage movement split into two factions over the 15th Amendment. In its final form the 15th Amendment promised that the "right of citizens of the United States to vote shall not be denied or abridged by the United States or by any state on account of race, color, or previous condition of servitude."

No mention was made of gender. Elizabeth Cady Stanton, Susan B. Anthony, and their following were terribly offended by this omission. They assumed that the rights of women would be championed alongside the rights of black men and they opposed the Amendment on the basis of women's exclusion.

Other reformers like Lucy Stone and Mary Livermore, though not happy, supported the amendment anyway. They feared, as did a number of male legislators, that if women were included, the amendment would not pass and no new suffrage rights would be won.

And surely, they thought, the tide of change was upon them! Surely it would be only a matter of years before women, too, won the vote.