Sangju (상주) Battlefield
The battle of Sangju was the first real field battle between the invading Japanese forces under Konishi Yukinaga and the forces of Joseon Korea. Charging forward without waiting for the second and third contingent of samurai and ashigaru invaders, Yukinaga took Busan, Dongnae, and then marched on Saejae (Joryeong) Pass, the central route to the capital at Seoul. Taking Daegu in stride, the Japanese headed northwest toward the important town of Sangju.
This was also the destination of Joseon General Yi Il and his 60 professional cavalrymen. His orders were to take command of the small garrison guarding the government granary there, raise whatever additional troops he could, then do what he could to delay the invaders in their advance to the north. Arriving at Sangju, Yi Il found the garrison had already been called away to help defend Daegu. Despairing of his situation, Yi Il offered the government grain in exchange for conscription. 840 peasants answered the call and formed up on the slope of two hills, across the stream north of Sangju. Yi Il thought he had weeks to train them into a viable force. Yukinaga arrived the next day and the ensuing battle was a slaughter as his veteran troops—armed with copies of Portuguese arquebuses—mercilessly cut down the untrained rabble.
The result was an unmitigated disaster and Yi Il was forced to abandon both horse and heavy armor in a desperate bid to escape over the Saejae (Joryeong) Pass. His unexpected arrival before General Sin Rip at Chungju upset the latter’s plan to defend the pass and contributed to an unmitigated disaster at Tangeumdae.