Saul mustered the troops and enrolled them at Telaim: 200,000 men on foot, and 10,000 men of Judah
There are 12 tribes, so on average they supplied 18k troops. Judah supplied just over half of that (if we assume that 200k were from the 11 other tribes, Yehuda's contribution is even more sub-par).
Why so few soldiers came from Judah?