By June 1927,
United States Marine Corps Captain Gilbert D. Hatfield's original eight men at Ocotal had been augmented to forty-one men, with the intention of patrolling the
Nueva Segovia area, and further augmented on July 11 by ''Guardia Nacional's'' 1st Co. Upon arriving at the town of Ocotal, Captain Hatfield expected enemy activity so he had his men build an airstrip and establish telegraph service with the surrounding town. Daylight brought two marine aircraft into the battle. At around 10:00 am, one of the planes, piloted by
Lieutenant Hayne D. Boyden, landed near Ocotal to inquire about the seriousness of the situation, while the other plane, piloted by
Gunner Michael Wodarczyk, strafed the enemy's positions. A little later, Lieutenant Boyden reboarded his plane, made a few more strafing runs and then flew back to Managua where he informed
Major Ross E. Rowell of the battle. Major Rowell responded by forming a squadron of five
De Havilland DH-4 biplanes armed with machine guns and four twenty-five pound bombs each. At 2 PM, Rowell's squadron arrived at Ocotal and began dropping bombs on the rebels at 300 to 1,000 feet for about forty-five minutes. Sandino's men, who had never been attacked by aircraft before, began a panic retreat in what was history's first
dive bombing attack in tactical support of ground troops. ==Aftermath==