Why were unions more successful in the early 1920s?

Increased consumption made workers more valuable
Shift in government policies
Lack of monopolies to negotiate with leaders
Large number of workers demanding rights

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Explanation:

It happened in 1850 and Germany was in it

explanation:

japan participated in world war i from 1914 to 1918 in an alliance with entente powers and played an important role in securing the sea lanes in the west pacific and indian oceans against the imperial german navy as the member of the allies.