Fals - al-Ẓāhir Baybars I

Baybars I came to power through the assassination of his own sultan, Qutuz, days after the Mamluk victory at Ain Jalut in 1260 — the battle that halted the Mongol advance into Egypt and the Levant. That political murder notwithstanding, Baybars proved the most consequential ruler of the Mamluk period, reorganizing the postal relay system, fortifying the Syrian frontier, and systematically dismantling the remaining Crusader holdings. Fals coinage of his reign circulated heavily in urban markets where silver was scarce or hoarded.

Ain Jalut itself was fought on September 3rd, 1260 — Baybars was commanding the vanguard.