How did Jordan annexation of the west bank and Jerusalem after the war of 1948 affect that country?

Answer 1

It is unclear to me what the "that country" means in the question as written. I do not know if this refers to the future State of Palestine or if it refers to the Kingdom of Jordan. As a result, I have addressed it from both perspectives.

West Bank Under Jordanian Control
The West Bank was controlled by the Jordanian army in Judea (the southern lobe of the West Bank), and by the Iraqi army in Samaria (the northern lobe of the West Bank). Both armies had expelled all Jews who may have lived in the West Bank prior the ceasefire, making the territory exclusively Islamic and Christian. Initially, the armies of those countries imposed martial law on the regions that they conquered. After a few months, the Iraqis found that maintaining such a long-distance colonization was not worth it to them and they ceded their territory to Jordan. Jordan then annexed the whole West Bank on April 24, 1950 in a move that was condemned internationally (save for Great Britain, Iraq, and Pakistan which approved the act). All West Bank Palestinians became Jordanian citizens. However, Jordan made no overt acts to open up the refugee camps and fully integrate the Palestinian Jordanian refugees into Jordanian society, making the refugees reliant on UNRWA for assistance. Most Palestinian-Jordanians made their lives as farmers as Jordan did not invest significantly in modifying the infrastructure of the area. A significant number of Palestinian-Jordanians crossed from the West Bank to the East Bank during the Jordanian Occupation period in order to find work or better jobs. Finally, in violation of the terms of the Jordanian-Israeli armistice agreement, Jordan forbid both Israelis (including non-Jewish Israelis) and Jews (from outside of Israel) to visit any of the Jerusalem holy sites and proceeded to demolish numerous historic synagogues, abuse the Western Wall holy site, and to use gravestones from historic Jewish cemeteries to build latrines for Jordanian army barracks.

Kingdom of Jordan Proper
Since many Palestinian-Jordanians had crossed from the West Bank to the East Bank during Jordan's annexation of the West Bank, they formed a large population within Jordan even after the Six-Day War brought the West Bank under Israeli Occupation. This created a large immigrant population of Palestinian-Jordanians in Jordan and resulted in discrimination against them, especially in the labor markets. Angered by their historic mistreatment under the Jordanians and the Jordanian failure to hold onto the West Bank, Palestinian Militants rose up against the Jordanian Government in 1970. King Hussein's response was to violently crush the uprising. The two sides fought a war from September 1970 to July 1971 called "Black September" or the "Jordanian Civil War". Estimates of the Palestinian dead are between 300 and 20,000, but typical estimates are around the 15,000 mark, making this event in Jordan more deadly to Palestinians than the entire Israeli-Palestinian Conflict prior to 2005.

Answer 2

It is unclear to me what the "that country" means in the question as written. I do not know if this refers to the future State of Palestine or if it refers to the Kingdom of Jordan. As a result, I have addressed it from both perspectives.

West Bank Under Jordanian Control
The West Bank was controlled by the Jordanian army in Judea (the southern lobe of the West Bank), and by the Iraqi army in Samaria (the northern lobe of the West Bank). Both armies had expelled all Jews who may have lived in the West Bank prior the ceasefire, making the territory exclusively Islamic and Christian. Initially, the armies of those countries imposed martial law on the regions that they conquered. After a few months, the Iraqis found that maintaining such a long-distance colonization was not worth it to them and they ceded their territory to Jordan. Jordan then annexed the whole West Bank on April 24, 1950 in a move that was condemned internationally (save for Great Britain, Iraq, and Pakistan which approved the act). All West Bank Palestinians became Jordanian citizens. However, Jordan made no overt acts to open up the refugee camps and fully integrate the Palestinian Jordanian refugees into Jordanian society, making the refugees reliant on UNRWA for assistance. Most Palestinian-Jordanians made their lives as farmers as Jordan did not invest significantly in modifying the infrastructure of the area. A significant number of Palestinian-Jordanians crossed from the West Bank to the East Bank during the Jordanian Occupation period in order to find work or better jobs. Finally, in violation of the terms of the Jordanian-Israeli armistice agreement, Jordan forbid both Israelis (including non-Jewish Israelis) and Jews (from outside of Israel) to visit any of the Jerusalem holy sites and proceeded to demolish numerous historic synagogues, abuse the Western Wall holy site, and to use gravestones from historic Jewish cemeteries to build latrines for Jordanian army barracks.

Kingdom of Jordan Proper
Since many Palestinian-Jordanians had crossed from the West Bank to the East Bank during Jordan's annexation of the West Bank, they formed a large population within Jordan even after the Six-Day War brought the West Bank under Israeli Occupation. This created a large immigrant population of Palestinian-Jordanians in Jordan and resulted in discrimination against them, especially in the labor markets. Angered by their historic mistreatment under the Jordanians and the Jordanian failure to hold onto the West Bank, Palestinian Militants rose up against the Jordanian Government in 1970. King Hussein's response was to violently crush the uprising. The two sides fought a war from September 1970 to July 1971 called "Black September" or the "Jordanian Civil War". Estimates of the Palestinian dead are between 300 and 20,000, but typical estimates are around the 15,000 mark, making this event in Jordan more deadly to Palestinians than the entire Israeli-Palestinian Conflict prior to 2005.