'Means' in the Bible

In the second year of Darius the king [of Persia], on the first day of the sixth month (Aug 29, 520 b.c.), the word of the Lord came by Haggai the prophet to Zerubbabel the son of Shealtiel, governor of Judah, and to Joshua the son of Jehozadak, the high priest, saying,

I will overthrow royal thrones. I will annihilate the strength of national governments. I will overthrow chariots along with those who drive them. Both horses and their riders will fall, each one by means of his comrade's weapon.