Operation Dani, also spelled Danny, was an Israeli military offensive launched on July 9–19, 1948 at the end of the first truce of the 1948 Arab–Israeli War. The objectives were to capture territory east of Tel Aviv and then to push inland and relieve the Jewish population and forces in Jerusalem. The main forces fighting against the IDF were the Arab Legion and Palestinian irregulars

On 10 July, Glubb Pasha ordered the defending Arab Legion troops to "make arrangements ... for a phony war".

The operation commander was Yigal Allon and his deputy was Yitzhak Rabin. The total force numbered around 6,000 soldiers.

The operation was named after Palmach officer Daniel "Dani" Mass, who had fallen on January 16, 1948, while commanding a relief action known as "Convoy of 35".^{[citation needed]}

The first phase of Operation Dani was to capture the cities of Lydda and Ramle, located on the road to Jerusalem, southeast of Tel Aviv. Ramle was one of the main obstacles blocking Jewish transportation. From the start of the war, Lydda and Ramle militiamen had attacked Jewish traffic on nearby roads. Ramle became a focal point for blocking Jewish transportation, forcing traffic from Jerusalem to Tel Aviv to a southern bypass.

The second phase was to capture the fort at Latrun and break through Ramallah. The operation was carried out under Palmach command using the Yiftach Brigade, the Harel Brigade, the 8th Armored Brigade and two battalions from the Kiryati and Alexandroni brigades.

On 9 July units from the Yiftach Brigade began approaching Ramle from the south. At the same time troops from the other brigades began attacking villages north of Lydda. Caught in a pincer movement and with only a token Arab Legion presence the two towns were captured the following day. This put Lydda airport and the strategic railway station at Ramle in Israeli hands.

As part of the 1948 Palestinian expulsions, Israeli forces violently expelled 50,000-70,000 people from Lydda and Ramle, killing hundreds.