Put themselves in array at Baal-tamar - The Israelites seem to have divided their army into three divisions; one was at Baal-tamar, a second behind the city in ambush, and the third skirmished with the Benjamites before Gibeah.
Baal-tamar is only mentioned here. It took its name from some palm-tree that grew there; perhaps the same as the “palm-tree of Deborah, between Ramah and Bethel” Judges 4:5, the exact locality here indicated, since “the highway” Judges 20:31 along which the Israelites enticed the Benjamites to pursue them, leads straight to Ramah, which lay only a mile beyond the point where the two ways branch off.
The meadows of Gibeah - The word rendered “meadow” is only found here. According to its etymology, it ought to mean a “bare open place”, which is particularly unsuitable for an ambush. However, by a change in the vowel-points, without any alteration in the letters, it becomes the common word for “a cavern”.