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The Germans thought that Botha's advance would be hampered by a lack of water and rough terrain, and were ill-prepared for the looming South African attack. At his disposal Botha had 3,500 cavalry compared to Ritter's 1,000 infantry and ten machine guns. Although heavily outnumbered, Ritter's forces did have the advantage of the high ground, as the territory they defended was quite mountainous. Despite this advantage, Ritter feared that his force would become surrounded and spread his forces out to lengthen his line of defense. Because Ritter's line of defense was so long, his flanks were unable to support each other. That, combined with his lack of forces to man such a wide perimeter adequately, caused his left flank to falter when the South African forces advanced upon it. Fearful his lines would break, Ritter pulled back to the hills of Otavifontein and to Otavi mountain. Despite the fact that these new positions held the high ground, the Germans had not prepared any fortifications there. With no artillery and no solid defensive positions, the German force easily broke into a general retreat when pressed by Botha's troops. By 1pm the battle had ended, with Ritter pulling back to positions near Gaub and leaving Botha with a clear path to the main German body at Tsombe.
Eugen Mansfeld, who was present at the battle as a Reserve Leutnant in the German forces, laid the blame for German defeat squarely on Franke. Mansfeld stated that Major Ritter had occupied an excellent defensive position at Otavifontein, but that on the morning of 28 June 1915 Franke arrived with his staff officer and ordered a redisposition of Ritter's forces south of the original position, separating Ritter's three artillery batteries and leaving the companies of troops widely dispersed in no logical order. Mansfeld suggested that if the Germans had kept to Ritter's original plan, the South African forces—who were unable to transport water by railway—would have been forced to retreat to the nearest water station, with severe losses to their horses as a result.[8]Botha's victory was swift, with the South African advance being delayed only a day and suffering only four dead and seven wounded. The Germans had fled without putting up any committed defense, and Ritter's force fled largely intact with only three dead, eight wounded, and twenty captured. Although a delay of just two days by Ritter would have sufficed, Ritter's early withdrawal allowed Franke's unprepared forces to become nearly encircled. The German forces retreated to the farm of Khorab, where on 5 July 1915 they set up a defensive position around the farmhouse and reservoir. With no means of escaping further up the rail line and a general lack of will to pursue any other course of action, Franke had little choice but to surrender his forces to Botha on 9 July 1915, effectively ending all major German resistance in Southwest-Africa.
