What is urgent there's nothing to answer?
In a feudal system, a vassal, akin to a serf in most contexts, in general worked land on a lord's fiefdom in exchange for some of the produce from the land and some military protection.
In brief, the issue of segregated proms goes against the constitution which is the foundation of the country. In Plessy v, Ferguson, the Supreme Court ruled that the Fourteenth Amendment provides equal protection which prohibits racial segregation. This includes any form of segregation such as in proms
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<h3>The Japanese advanced to within sight of Port Moresby but withdrew on 26 September. They had outrun their supply line and had been ordered to withdraw in consequence of reverses suffered at Guadalcanal.</h3>
A federal judge ruled about Japanese relocation 40 years after the fact, in 1986, that it was overall an unconstitutional action on part of the Roosevelt Administration.