Six Day War Battle Front in West Bank: Jordan was reluctant to enter the war. Nasser used the obscurity of the first hours of the conflict to convince Hussein that he was victorious; he claimed as evidence a radar sighting of a squadron of Israeli aircraft returning from bombing raids in Egypt which he said was an Egyptian aircraft en route to attacking Israel. One of the Jordanian brigades stationed in the West Bank was sent to the Hebron area in order to link with the Egyptians. Hussein decided to attack.

Prior to the war, Jordanian forces included 11 brigades totaling some 55,000 troops, equipped with some 300 modern Western tanks. Of these, nine brigades (45,000 troops, 270 tanks, 200 artillery pieces) were deployed in the West Bank, including elite armored 40th, and 2 in the Jordan Valley. The Arab Legion was a long-term-service, professional army relatively well-equipped and well-trained. Furthermore, Israeli post-war briefings said that the Jordanian staff acted professionally as well, but was always left "half a step" behind by the Israeli moves. The tiny Royal Jordanian Air Force consisted of only 24 UK Hawker Hunter fighters. According to the Israelis, the British-made Hawker Hunter was essentially on par with the French-built Dassault Mirage III - the IAF's best plane.

Against Jordan's forces on the West Bank, Israel deployed about 40,000 troops and 200 tanks (8 brigades). Israeli Central Command forces consisted of five brigades. The first two were permanently stationed near Jerusalem and were called the Jerusalem Brigade and the mechanized Harel Brigade. Mordechai Gur's 55th paratrooper brigade was summoned from the Sinai front. An armored brigade was allocated from the General Staff reserve and advanced toward Ramallah, capturing Latrun in the process. The 10th armored brigade was stationed north of the West Bank Region. The Israeli Northern Command provided a division (3 brigades) led by Maj. Gen. Elad Peled, which was stationed to the north of the West Bank, in the Jezreel Valley.

The IDF's strategic plan was to remain on the defensive along the Jordanian front, to enable focus in the expected campaign against Egypt. However, on the morning of 5 June, Jordan began shelling targets in west Jerusalem, Netanya, and the outskirts of Tel Aviv. The Royal Jordanian Air Force attacked Israeli airfields. Despite this, both air and artillery attacks caused little damage, and Israel sent a message promising not to initiate any action against Jordan if it stayed out of the war. Hussein replied that it was too late, "the die was cast". On the evening of June 5, the Israeli cabinet convened to decide what to do; Yigal Allon and Menahem Begin argued that this was an opportunity to take the Old City of Jerusalem, but Eshkol decided to defer any decision until Moshe Dayan and Yitzhak Rabin could be consulted. Uzi Narkis made a number of proposals for military action, including the capture of Latrun, but the cabinet turned him down. The Israeli military only commenced action after Jordanian forces made thrusts in the area of Jerusalem.

Jordanian troops seized the Government House compound, used as the headquarters for the UN observers in a Demilitarized zone since the 1949 Armistice Agreements. In addition, the Jordanians opened a heavy-artillery barrage on western Jerusalem, as well as targeting the center of the country.

At the UN Security Council meeting of June 5, 1967 Secretary-General U Thant reported that:

"at 1330 hours local time today approximately one company of Jordanian soldiers occupied the garden of the Government House.

"General Bull later informed me by an emergency message that Jordanian troops had not with-drawn and were demanding to enter Government House itself and had demanded that no telephone calls be made from Government House. Firing was continuing and mortar shells were now landing within the Government House compound. United Nations Headquarters lost radio contact with UNTSO headquarters in Jerusalem at 0852 hours New York time, at which time Jordanian troops occupied Government House1/. This also means that United Nations Headquarters has lost direct contact with headquarters UNEF, whose messages are routed through UNTSO."

1/ it is to be noted that the report that Jordanian troops had "occupied" Government House was originally based on incomplete information owing to a communicaitons [sic] breakdown caused by the events in the Government House area. On the basis of a review of events and a checking with the Chief of Staff of UNTSO, it was later determined that the actual facts as regards the reported entry of Jordanian troops into Government House on 5 June 1967 were as follows: at approximately 1445 hours local time, three Jordanian soldiers entered Government House over the protest of UNTSO, but were persuaded by UNTSO staff to leave the building after about ten minutes.

On June 6, Israeli units were scrambled to attack Jordanian forces in the West Bank. In the afternoon of that same day, Israeli Air Force (IAF) strikes destroyed the Royal Jordanian Air Force. By the evening of that day, the Jerusalem infantry brigade moved south of Jerusalem, while the mechanized Harel and Gur's paratroopers encircled it from the north. The reserve paratroop brigade completed the Jerusalem encirclement in the bloody Battle of Ammunition Hill, in which 71 Jordanian and 37 Israeli soldiers were killed. Fearing damage to holy places and having to fight in built-up areas, Dayan ordered his troops not to go into the city itself.

On June 7, heavy fighting ensued. The infantry brigade attacked the fortress at Latrun, capturing it at daybreak, and advanced through Beit Horon towards Ramallah. The Harel brigade continued its push to the mountainous area of northwest Jerusalem, linking the Mount Scopus campus of Hebrew University with the city of Jerusalem. By the evening, the brigade arrived in Ramallah. The IAF detected and destroyed the 60th Jordanian Brigade en route from Jericho to reinforce Jerusalem.

In the north, one battalion from Peled's division was sent to check Jordanian defenses in the Jordan Valley. A brigade belonging to Peled's division captured the western part of the West Bank, another captured Jenin and the third (equipped with light French AMX-13s) engaged Jordanian M48 Patton main battle tanks to the east.

Dayan had ordered his troops not to enter Jerusalem; however, upon hearing that the UN was about to declare a ceasefire, he changed his mind, and without cabinet clearance, decided to take the city. Gur's paratroopers entered the Old City of Jerusalem via the Lion's Gate, and captured the Western Wall and the Temple Mount. The intense battle for the Old City was fought mostly by paratroopers, who had to engage in heavy street fighting. The Israeli high command had ordered the IDF not to use heavy armor in the Old City - since this was an area holy to Judaism, the Israeli government wanted to leave it intact. The Jerusalem brigade then reinforced the paratroops, and continued to the south, capturing Judea, Gush Etzion and Hebron. The Harel brigade proceeded eastward, descending to the Jordan River.

In the West Bank, one of Peled's brigades seized Nablus; then it joined one of Central Command's armored brigades to fight the Jordanian forces; as the Jordanians held the advantage of superior equipment and were equal in numbers to the Israelis.

Again, the air superiority of the IAF proved paramount as it immobilized the enemy, leading to its defeat. One of Peled's brigades joined with its Central Command counterparts coming from Ramallah, and the remaining two blocked the Jordan river crossings together with the Central Command's 10th (the latter crossed the Jordan river into the East Bank to provide cover for Israeli combat engineers while they blew the Abdullah and Hussein bridges, but was quickly pulled back because of American pressure).

No specific decision had been made to capture any other territories controlled by Jordan. After the Old City was captured, Dayan told his troops to dig in to hold it. When an armored brigade commander entered the West Bank on his own initiative, and stated that he could see Jericho, Dayan ordered him back. It was only after intelligence reports indicated that Hussein had withdrawn his forces across the Jordan River that Dayan ordered his troops to capture the West Bank. According to Narkis:

First, the Israeli government had no intention of capturing the West Bank. On the contrary, it was opposed to it. Second, there was not any provocation on the part of the IDF. Third, the rein was only loosened when a real threat to Jerusalem's security emerged. This is truly how things happened on June 5, although it is difficult to believe. The end result was something that no one had planned.