Commander James Schenck had been ordered east by Flag Officer Frederick K. Engle of the East India Squadron with a single task: find the missing boat crew from the American merchant ship Myrtle, last seen somewhere along the south central coast of Vietnam. The Saginaw was a light vessel — a paddle steamer sloop armed with a 50-pounder, a 32-pounder, and two 24-pound rifled guns — but her mission was diplomatic, not military. She carried fifty officers and enlisted men, and arrived off Qui Nhơn on July 30 to reconnoiter before entering the harbor at 1:00 in the morning. The timing was cautious. The intentions were peaceful. Nobody told the fort.

After three shots with no pause, Schenck abandoned the white flag. The Saginaw reversed course slowly, backing out to 900 yards while her crew ran to battle stations — a dangerous, exposed maneuver with enemy guns trained on her. Once clear, the Americans opened up with a single 32-pounder. The exchange lasted roughly twenty minutes before the Vietnamese guns went silent. Then came a secondary explosion: the fort's powder magazine, or one of the guns themselves, had blown. Whatever the cause, the guns did not fire again. The Saginaw's gunners kept firing for another half-hour anyway, until the fort was rubble. American forces suffered no casualties and no damage.

The Vietnamese defenders inside that fort had no way of knowing the Saginaw's purpose. They saw a foreign warship entering their harbor before dawn during a period when French and Spanish forces were actively conquering southern Vietnam — the Cochinchina Campaign was already underway. The men who manned those guns were soldiers of the Nguyễn dynasty, defending a coastal port under genuine threat of colonial seizure. The secondary explosion that silenced them almost certainly killed some of their number. History does not record their names. After the bombardment, when Schenck's crew tried to communicate with Vietnamese officials ashore, the conversation came to nothing, and the Saginaw steamed back toward Hong Kong.

The whole operation — the search for the Myrtle's missing boat crew, the diplomatic probe at Qui Nhơn, the accidental battle — ended without its stated purpose being achieved. The men of the Saginaw never found the missing American sailors. Schenck filed his report and sailed east to join the West Gulf Blockading Squadron, crossing to a different war entirely. He would go on to serve with distinction at the battles for Fort Fisher during the American Civil War. The harbor at Qui Nhơn remained in Vietnamese hands. The ruins of the fort faded into the landscape of the south central coast, a footnote to a larger colonial catastrophe unfolding around it.

The city of Qui Nhơn spreads along one of the most beautiful natural harbors on Vietnam's central coast, backed by green hills and open to the East Sea. The bay where the Saginaw's anchor first dropped is now ringed by hotels and fishing boats. The fort to the north that once opened fire is long gone. What remains is a modern port city of roughly a million people — a place that bore French, American, and Vietnamese military presences across a century of conflict, and emerged on the other side. The 1861 bombardment was a minor skirmish in a very large history, but it offers a precise, almost cinematic glimpse of how great powers stumbled into violence along these shores.