What carol is sung at the end of a charlie brown christmas

What did populists set their sights on after achieving some success on a local level in the late 1800s?

When the communist, under mao, took control of china in 1949 they announced total support support for which country and its ideology?

In exchange for land, a knight agrees to be a sort of sub-vassal to a vassal. this agreement was known as: investiture homage tyranny subinfeudation