After conquering Gandhara and solidifying his supply line back to Bactria, Alexander combined his forces with the King Ambhi of Taxila and crossed the River Indus in July 326 BC to begin the Archosia (Punjab) campaign. His first resistance would come at the River Jhelum near Bhera against King Porus of the Paurava tribe. The famous Battle of the Hydaspes (Jhelum) between Alexander (with Ambhi) and Porus would be the last major battle fought by him. After defeating King Porus, his battle weary troops refused to advance into India to engage the army of Nanda Dynasty and its vanguard of trampling elephants. Alexander, therefore proceeded south-west along the Indus Valley. Along the way, he engaged in several battles with smaller kingdoms in Multan and Sindh, before marching his army westward across the Makran desert towards what is now Iran. In crossing the desert, Alexander's army took enormous casualties from hunger and thirst, but fought no human enemy. They encountered the "Fish Eaters", or Ichthyophagi, primitive people who lived on the Makran coast, who had matted hair, no fire, no metal, no clothes, lived in huts made of whale bones, and ate raw seafood.