Shamgar

The Philistines from the maritime plain had made incursions into the Hebrew upland for the purposes of plunder, when one of this name, the son of Anath, otherwise unknown, headed a rising for the purpose of freeing the land from this oppression. He repelled the invasion, slaying 600 men with an "ox goad" (q.v.). The goad was a formidable sharpointed instrument, sometimes ten feet long. He was probably contemporary for a time with Deborah and Barak (Judg 3:31; 5:6).

EBD - Easton's Bible Dictionary