Which was a major goal of early labor unions?

for those in the industrial sector, organized labor unions fought for better wages, reasonable hours and safer working conditions. the labor movement led efforts to stopping child labor, give health benefits and provide aid to workers who were injured or retired.

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ww1 weapons: tank. tanks were used for the first time in the first world war at the battle of the somme. they were developed to cope with the conditions on the western front. the first tank was called 'little willie' and needed a crew of 3.

i see, would you mind putting it as one?