The time of the Mashiach [Messiah]:What will happen?

Maimonides [Rambam]

The messiah will be a king descended from David who will lead the people of Israel in the ways of Torah and will gather the exiles and rebuild the Temple. At that time the whole world will serve Ha-Shem; there will be no more hunger or war and everyone will strive only for knowledge of Ha-Shem, as it says "For the earth is filled with knowledge of Ha-Shem".l7,f

[ 17,f : Jesaja  11:4; 12:5 ]