However, Allenby maintained pressure on the Ottoman armies by twice sending mounted and infantry divisions across the Jordan. The first attack briefly cut the Hejaz Railway near Amman before the attackers retreated. In the second attack, Allenby's troops captured Es Salt on the road to Amman, but fell back when their communications were threatened. Despite these failures, Allenby had established two bridgeheads across the Jordan north of the Dead Sea which were retained during the ensuing occupation of the southern Jordan Valley.