Ilseon (936) — the same event in Goryeosa, Goryeosa Jeolyo and Samguk Yusa

Goryeosa: Taejo leads three armies, joins at Cheonan-bu, and reaches Ilseon district, where Singeom comes out to meet him with troops.; Goryeosa…

What each source says

Goryeosa (History of Goryeo) · AD 936 · 구미

Taejo leads three armies, joins at Cheonan-bu, and reaches Ilseon district, where Singeom comes out to meet him with troops.

秋九月,王率三軍,至天安府合兵,進次一善郡,神劒以兵逆之。
Location: 世家 卷2 太祖 十九年

Goryeosa (History of Goryeo) · AD 936 · 구미

Taejo orders Gong Hwon to strike the central army directly, and the three armies advance together; the enemy collapses.

王命大將軍公萱,直擣中軍,三軍齊進奮擊,賊兵大潰。
Location: 世家 卷2 太祖 十九年

Goryeosa Jeolyo (Essentials of Goryeo History) · AD 936 · 善山

September 936: the king leads three armies to Ilseon, and Singeom draws up his forces across the Illi River — the final showdown with Later Baekje

神劍以兵逆之,隔一利川而陣。
Location: 권1 太祖神聖大王 十九年

Samguk Yusa (Memorabilia of the Three Kingdoms) · AD 936 · Seonsan (Ilseon)

In the ninth month Taejo led three armies, joined at Cheonan, advanced to Ilseon, and faced Singeom's army at Illicheon, where the Later Baekje army collapsed.

太祖率三軍至天安。合兵進次一善
Location: 紀異第二 後百濟 甄萱

Place: 구미 · 善山

Show on the map — open Goryeosa (History of Goryeo)