The siege of Keren, February to March 1941, was a brutal battle in Eritrea between the Italianand Commonwealth troops.
From February 2nd to March 27th. As usual, the Italian troops fought gallantly, but the higher commands did not understand the importance of the site and did send reinforcements piecemeal, never en masse. At the end, without air cover and running out of food, water and ammunition, ours had to surrender or retreat elsewhere. I have a great book about that battle. I probably read it as a very early teenager for the first time.