The growing numbers and strength of the Israelites at last alarmed the Canaanites. A certain leader by the name of Sisera formed a coalition of the strong Canaanite cities encircling the Plain of Esdraelon. The centre of this coalition was the powerful city of Megiddo, the ruins of which on the south-western side of the plain still remain to testify to the natural strength of this ancient stronghold. The policy of the Canaanites was to keep the different Hebrew clans apart and thus prevent united action. In the words of the ancient song: In the days of Jael the highways were unused, And travellers walked by round-about paths. The rulers ceased in Israel; A shield was not seen in five cities Nor a spear among forty thousand. The one who alone appears to have understood the crisis and to have been able to stir the Israelites to action was Deborah, the prophetess of the central tribe of Issachar. Israel's struggle for independence is graphically recorded in the ancient poem found in Judges 5. The later prose version of the incident, found in Judges 4, supplements the earlier poem. To a chief of a northern tribe of Napthali, a certain Barak, she turned as the natural leader in the struggle for independence. Together they sent out the summons to the different northern tribes. The southern tribes of Judah and Simeon were apparently ignored. The distant tribes of Asher, Dan and Reuben were engrossed in their local interests and failed to respond. The tribesmen who rallied forty thousand strong on the northern side of the Plain of Esdraelon represented the great central Hebrew clans. The ancient song, sung by the women as they met the returning warriors, makes it possible to reconstruct the battle scene. Through the broad valleys that lead into the Plain of Esdraelon from the north came the sinewy, unkempt, roughly clad and poorly equipped Hebrew tribesmen, each clan led by its local chief. They had "come up to the help of Jehovah against the mighty." Tribal patriotism, the memory of past grievances, the desire for plunder, and zeal for Jehovah the God who had led their forefathers through the wilderness into the land of Canaan, stirred their courage and fired them to deeds of valor. Well they chose their battlefield, out on the plain on the northern side of the muddy, sluggish river Kishon. On the slightly rising ground they faced the Canaanite warriors who came out across the plain from the city of Megiddo, six miles away. The Canaanites were armed with chariots and the best weapons that the early Semitic civilization could produce, but one thing they lacked,--courage, fired by religious zeal. Again a striking natural phenomenon appears suddenly to have turned the tide of Israel's fortune. On the eve of battle a drenching thunderstorm seems to have swept across the alluvial plain transforming it into a morass and the sluggish Kishon into a rushing, unfordable river. In the words of the ancient triumphal ode: