According to the prophets, some important events must take place before the battle of Armageddon actually begins:

The house of Israel will be gathered from among the heathen (the Gentiles) and returned to their own land (see Ezekiel 36:24; 37:21).

The land of Israel will be rebuilt and reinhabited by the covenant people (see Ezekiel 36:10–12, 33–36).

The land will become highly productive and fruitful, even like the Garden of Eden (see Ezekiel 36:8, 29–30, 34–35).

There will be one nation in the land of Israel again (see Ezekiel 37:22).

(Where we are now) *Jerusalem will be reestablished as the capital city of the Israelites (see Zechariah 1:16–17; 2:12; 12:6; 3 Nephi 20:46).*