Here "the earth" represents the people of the earth. AT: "one-fourth of the people on the earth" (See: [[rc://en/ta/man/translate/figs-metonymy]] and [[rc://en/ta/man/translate/translate-fraction]])
# the sword
A sword is a weapon, and here it represents war. (See: [[rc://en/ta/man/translate/figs-metonymy]])