11 The LORD thunders at the head of his army; his forces are beyond number, and mighty is the army that obeys his command. The day of the LORD is great; it is dreadful. Who can endure it?

Read Joel 2:11 Using Other Translations

And the LORD shall utter his voice before his army: for his camp is very great: for he is strong that executeth his word: for the day of the LORD is great and very terrible; and who can abide it?
The LORD utters his voice before his army, for his camp is exceedingly great; he who executes his word is powerful. For the day of the LORD is great and very awesome; who can endure it?
The LORD is at the head of the column. He leads them with a shout. This is his mighty army, and they follow his orders. The day of the LORD is an awesome, terrible thing. Who can possibly survive?