Complex sentence: On the night of June 1--2 the vehicles returned, and with them were three jeeps from Jerusalem, that went on to Tel Aviv to organize a supply convoy for Jerusalem, which returned that night.
Split into simpler sentences: On the night of June 1--2 the vehicles returned, and with them was a group from Jerusalem in three jeeps. The jeep party went on to Tel Aviv to organize a supply convoy for Jerusalem, which returned that night.