Portuguese offensive was not a complete surprise for the German side. Part of the land to the South of the Ruvuma river on the German-Portuguese boundary in East Africa, the Germans captured in 1892, despite the Protocol of 1886, gave them Portugal. Since then, the Portuguese were looking for a convenient excuse to take back what is rightfully considered his. But, capturing approximately 45 hectares, the troops rested in the river, and the attack itself was a failure. In distant Africa came trench warfare.
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