Robert Hutchings Goddard was an American professor, physicist, and inventor who is credited with creating and building the world's first liquid-fueled rocket. Goddard and his team launched 34 rockets between 1926 and 1941, achieving altitudes as high as 2.6 km (1.6 mi) and speeds as high as 885 km/h (550 mph). Goddard's work as both theorist and engineer anticipated many of the developments that were to make spaceflight possible. Goddard received little public support for his research during his lifetime. Although his work in the field was revolutionary, he was sometimes ridiculed in the press for his theories concerning spaceflight. As a result, he became protective of his privacy and his work. He's recognized as one of the founding fathers of rocketry. Not all of Goddard's early work was geared towards space travel. As the United States entered World War I in 1917, the country's universities began to lend their services to the war effort. Goddard believed his rocket research could be applied to many different military applications, including mobile artillery, field weapons and naval torpedoes. He made proposals to the Navy and Army. No record exists of any interest by the Navy to Goddard's inquiry. However, Army Ordnance was quite interested, and Goddard met several times with Army personnel. Goddard did create a kind of bazooka for infantry troops.