In the late 1930s, Busir arrived in Cairo where he entered Al-Azhar al-Sharif Theological University.
In the Kingdom of Egypt, the British had a large economic and governmental presence.
At the same time, there was a popular movement to decrease British influence and restore Egyptian sovereignty.
On the one hand, this contributed to the growth of Arab nationalism.
However, since the British were opponents of the Italians, the Libyans who studied in Egypt, unlike the Egyptians, saw them as their allies.
Salah Busir quickly became one of the prominent figures among Libyan students at the university.
He involved himself in politics and actively participated in meetings where the regime of fascist Italy was condemned.

When World War II broke out, the situation in Libya became more volatile.
Busir, a fledgling journalist in Cairo, began giving speeches over the radio which were broadcast to Italian Libya.
He denounced the policies of the fascist Italians and called on the people to begin a “holy war” against the Italians.
The British administration in Egypt soon took notice of Busir, and, in 1943, when Libya was liberated from the Italo-German forces, he returned to his homeland.
There he began to spread political information and the goals of the allied forces.
He worked for the Benghazi newspaper “(Arabic: بنغازي‎)”, published by the Allies, and then  in 1944 transferred to the newspaper Barka al- Jadida "(Arabic: برقة الجديدة‎ -" New Cyrenaica "), which was published in Arabic.
In the late 1930s, Busir arrived in Cairo where he entered Al-Azhar al-Sharif Theological University. In the Kingdom of Egypt, the British had a large economic and governmental presence. At the same time, there was a popular movement to decrease British influence and restore Egyptian sovereignty. On the one hand, this contributed to the growth of Arab nationalism. However, since the British were opponents of the Italians, the Libyans who studied in Egypt, unlike the Egyptians, saw them as their allies. Salah Busir quickly became one of the prominent figures among Libyan students at the university. He involved himself in politics and actively participated in meetings where the regime of fascist Italy was condemned.
When World War II broke out, the situation in Libya became more volatile. Busir, a fledgling journalist in Cairo, began giving speeches over the radio which were broadcast to Italian Libya. He denounced the policies of the fascist Italians and called on the people to begin a “holy war” against the Italians. The British administration in Egypt soon took notice of Busir, and, in 1943, when Libya was liberated from the Italo-German forces, he returned to his homeland. There he began to spread political information and the goals of the allied forces. He worked for the Benghazi newspaper “(Arabic: بنغازي‎)”, published by the Allies, and then  in 1944 transferred to the newspaper Barka al- Jadida "(Arabic: برقة الجديدة‎ -" New Cyrenaica "), which was published in Arabic.
Salah Busir