The security of the convoy was assigned to the Fifth Battalion of the Palmach Harel Brigade.
The sign is in the Harel Brigade Observatory, which was photographed that day by the same photographer Click for a larger image Translation of the text on the sign
Symbol of the Jewish National Fund
Symbol of the Harel Palmach Brigade Battle of the Harel Convoy
In mid-April 1948, word spread that the British had decided to advance evacuations from Jerusalem. Therefore, the Haganah High Command decided to bring most of the Palmach Harel fighters to the city, in order to capture the British outposts that would be evacuated.
On the morning of April 20, 1948, a large convoy came out of Hulda with about 300 vehicles, hundreds of fighters, the headquarters of the Harel Brigade and some of the leaders of the settlement, including David Ben-Gurion.
Most of the convoy reached the city in a few incidents, but the end of the convoy was attacked in the area of Deir Ayub - Shaar HaGai, by many Arab forces.
In the rescue attempts, 13 of the Palmach Harel and Haganah fighters fell.