In Washington and Riyadh, there¡¯s growing momentum behind efforts to end Yemen¡¯s war. But in the mountains that guard the conflict¡¯s latest prize, it¡¯s the fighting that is intensifying and it could make diplomacy futile.

¡°We don¡¯t care about all this talk of peace,¡± said Abdulrehman Ahmed, a soldier with Yemeni government forces repulsing a push by Iran-backed Houthi fighters to capture oil-rich Marib province. ¡°We¡¯re fully ready to fight until the end.¡±

Ahmed¡¯s on the most volatile front line of a war that¡¯s spread death, disease and hunger for six years, fueled by the Middle East¡¯s predominant feud between U.S. ally Saudi Arabia and foe Iran.