Why did Eritrea come under British administration during World War II?

Eritrea came under British administration during World War II as a direct result of the Allied military campaign to evict Italy from the Horn of Africa.12

Following Italy's entry into the war against the Allied powers, British forces launched an offensive to dismantle Italian East Africa, which had been established after Italy's 1935 invasion of Ethiopia. By removing Italian control, the British aimed to eliminate threats to the Suez Canal and protect British interests in the region.13

In January 1941, British troops under General William Platt invaded Eritrea from the Sudan. After the fall of the strategic Italian defense at Keren in March 1941, British forces secured control over the territory, including the capital, Asmara, and the port of Massawa. Eritrea remained under British administration for the following decade, a period marked by intense political activity regarding its future status.312