Among early labor unions, what was unique about the Knights of Labor?

i would say that the politicial parties from state to state varies.

answer: ensure protection from communism

explanation:

the north atlantic treaty was largely dormant until the korean war initiated the establishment of nato to implement it, by means of an integrated military structure: this included the formation of supreme headquarters allied powers europe in 1951, which adopted the western union's military structures and plans.

hello,

the steamboat is your answer.

it seems like its the only form of transportation on the choices.