Zubayr Ibn al-Awaam رضي الله عنه
(S75)
One report mentions Bilbees was conquered peacefully, however another mentions that it was taken by force. Zubayr رضي الله عنه climbed the fortress and uttered the Takbeer which shook the fort. It was conquered by the believers. The general of the Romans here was ar-Taboon, which means fox. His force was ~12,000. The Roman casualties were ~1,000. Our fox رضي الله عنه defeated their fox!
Before Baabliyoon could be conquered, Umm Daneen had to be conquered first. The siege lasted months.
The next siege at fort Baabliyoon lasted ~7 months! Amr رضي الله عنه summoned the Companions رضي الله عنهم of the Messenger ﷺ and said you go forward, through you Allah سُبْحَانَهُ وتَعَالَى will grant us victory. Again, Zubayr رضي الله عنه set the standard and went first, climbing the fortress and he said I am going to sacrifice my life for Allah سُبْحَانَهُ وتَعَالَى. They managed to open the gate and the believers were now able to enter.