NET
10 When Joab saw that the battle would be fought on two fronts, he chose some of Israel’s best men and deployed them against the Arameans.
Darby
10 And Joab saw that the front of the battle was against him before and behind; and he chose out of all the choice men of Israel, and put them in array against the Syrians;
KJV
10 Now when Joab saw that the battle was set against him before and behind, he chose out of all the choice of Israel, and put [them] in array against the Syrians.