Riblah was an ancient town in the northern frontier region of the land of Israel. It was located about 40 miles north of Baalbek, or Baalbec, on the east bank of the Orontes River. Since eastern invaders to the land of Israel usually avoided crossing the vast Arabian desert, they came in from the north, following the "fertile crescent" of the arc of the Tigris-Euphrates valley and Syria-Lebanon.
The foremost example of "invaders from the north," which involved Riblah, was when the Babylonian forces of King Nebuchadnezzar (see also Ancient Empires - Babylon and Why Babylon?) made their campaign headquarters there when his Babylonian army was conquering Judah. Back then, an "election campaign" was usually a military campaign, as it often still is today when one country invades another and then establishes a hand-picked puppet regime that the conquerers diplomatically claim is sovereign and free, something that in modern times Britain, and then more recently, the US and Britain, have repeated in the same area (see Back To Baghdad) - not that there's necessarily anything wrong with that; Might Makes Right is exactly how God is going to establish His Kingdom of God, not just in the Middle East, but in all the world, beginning at The Return Of Jesus Christ (see also Scenes From The Millennium).
Although it falls far short of it today, the God-commanded northern border of Israel reached right up to Riblah:
"The Lord said to Moses,"
"Command the people of Israel, and say to them, When you enter The Land Of Canaan, this is the land that shall fall to you for an inheritance, the land of Canaan in its full extent,"
"Your south side shall be from the wilderness of Zin along the side of Edom, and your southern boundary shall be from the end of The Salt Sea [i.e. the Dead Sea] on the east; and your boundary shall turn south of the ascent of Akrabbim, and cross to Zin, and its end shall be south of Kadesh-barnea; then it shall go on to Hazar-addar, and pass along to Azmon; and the boundary shall turn from Azmon to the Brook of Egypt, and its termination shall be at the sea."
"For the western boundary, you shall have the Great Sea [i.e. The Mediterranean Sea] and its coast; this shall be your western boundary."
"This shall be your northern boundary: from the Great Sea you shall mark out your line to Mount Hor; from Mount Hor you shall mark it out to the entrance of Hamath, and the end of the boundary shall be at Zeded; then the boundary shall extend to Ziphron, and its end shall be at Hazar-enan; this shall be your northern boundary."
"You shall mark out your eastern boundary from Hazar-enan to Shepham; and the boundary shall go down from Shepham to Riblah on the east side of Ain; and the boundary shall go down, and reach to the shoulder of the sea of Chinnereth [i.e. The Sea Of Galilee] on the east; and the boundary shall go down to the Jordan [i.e. The Jordan River], and its end shall be at the Salt Sea. This shall be your land with its boundaries all round." (Numbers 34:1-12 KJV)
Fact Finder: Was it at the Babylonian camp at Riblah that the Kingdom of Judah's last king, Zedekiah, watched his sons murdered, and then was himself blinded before being taken as a prisoner to Babylon?