'Mustered' in the Bible

So King Jehoram left Samaria at that time and mustered the entire army of Israel.

Meanwhile, all the Moabites heard that the kings had come up to attack them, so everyone old enough to wear battle armor was mustered to stand guard at the border.

Some time later, King Ben-hadad from Aram mustered his army, invaded the land, and attacked Samaria

And out of the city he took an officer that was set over the men of war, and five men of them that were in the king's presence, which were found in the city, and the principal scribe of the host, which mustered the people of the land, and threescore men of the people of the land that were found in the city: