how it originated ?

C.N.L.U was formed by African Americans to organize their labor collectively on a national level.

who started it?

lsaac myers started C.N.L.U. myers had organized black shipyard in a successful thing ,after the employer fired him. then he bought his own shipyard.`

what where their stances on labor issues?

african american where excluded from existing labor unions . such a when white worker formed the national labor union william sylvis made a speech should be no distinction of race or nationality."with in the ranks of his organization.

when did they get accomplished?

the national labor union was the first national labor federation in the united states. founded in 1866 and dissolved in 1874.it paved the way for other organizations suck as the knights of labor.