Despite the above factors, political parties were formed in Uganda between 1945 and 1962. The reasons for this drastic change to active participation in politics were:

The Second World War (1939 45) The War involved Germany, Italy and Japan against Britain, Russia, France and later USA. The Africans were taken to fight on the side of their colonial masters. The fighting took place in North Africa, Somalia, Ethiopia, South East Asia and the Pacific.

On the side of Africa, there were a number of positive political effects that led to the growth of nationalism.

Influence from Super Powers: USA and USSR were opposed to colonialism since they did not participate directly in colonial activities. Their influence came after the World War II after the collapse of the economies of Britain, France, Germany and Italy.

For a number of reasons, the two super power countries became too critical of colonial rule worldwide. The US in particular wanted to take over the market for her trade.

Failure of Conservative Party: It was this party with its leader Winston Churchill that supported continuation of colonial rule worldwide. The labour party led by Attlee Clement, which came to power in 1945, did not advocate for colonialism. Labour put pressures on Britain grant self-rule to her colonies everywhere.

The 1945 Manchester Conference: The 5th Pan African Congress took place in England. Outspoken and highly educated African nationalists like Kwame Nkrumah for Ghana, Jomo Kenyatta for Kenya, Dr. Hastings Kamuzu Banda for Malawi, Patrice Lumumba for Congo, Nigeria's Nnamdi Azikiwe, Guinea's Sekou Toure and Senegal's Leopold Senghor among others attended this conference. They were inspired to organise and prepare their people to struggle for independence. They advocated for independence among African countries.

Formation of the UN: This was formed shortly after World War II. The UN charter condemned imperialism in every part of the world. There was formed the decolonization and UN trusteeship council which advocated for independence of many countries. The Universal declaration of Human rights was declared in December in 1948 and advocated for equality of all people. Ugandans took this opportunity to form political parties.

Italian invasion: When Italy under the leadership Mussolini invaded Ethiopia in 1935 many African nationalists were concerned and were determined to defend Africa from the new form of decolonisation.

Colonial policies: The internal policies of the colonialists facilitated the growth of nationalism especially where some of these policies made Africans to suffer. Over taxation; loss of fertile land; discrimination in unemployment; destruction of local political institutions; forced labour with poor remuneration; and severe harassments were some of the serious issues.

Independent states: Existence of independent African states like Ethiopia and Liberia served as models for countries, which were fighting for their dignity. These two countries escaped European colonialism. Other Africans admired the freedoms the existed in independent countries.

Egyptian revolution: The 1952 Egyptian revolution led to the fall of the monarchy and King Farouk. Gamal Nasser provided assistance to the freedom fighters in Africa. For Uganda in particular, a foreign office for UNC was opened in Cairo. Musaazi's representative there was Kalekezi.

Independence: The acquisition of independence for developing countries like India (1947), Ghana (1957), Guinea (1958) added force in mass political changes and formation of political parties.

Education: The emergence of political elites who had acquired their education in different European countries was exposed to revolutionary, intellectual and nationalistic outlook. For example Africans in UK came up with a slogan of "no taxation without representation". They learnt of new principles of peace, justice, and equality for all. They formed different associations to struggle for their independence.

Non-aligned Movement: Non-aligned Movement refers to a group of organised developing countries that were neither aligned to the eastern bloc nor the western bloc during the cold war period. The first conference for the formation of the non-aligned movement took place at Bandung in Indonesia in 1955. It condemned colonialism and encouraged all people in colonies to struggle for self-rule.

The news of the 1952-1955 Mau Mau rebellion stepped up nationalistic feelings in Uganda.

The 1953-1955 Kabaka crisis for the first time united all Ugandans in demanding for his return.

The common hatred against the proposed East African federation led to nationalistic feelings in Uganda.

Sir Andrew Cohen's administration led to the growth of nationalism in Uganda. He was a reformer, ready to Africanise the politics of Uganda and called for a unitary government in Uganda.
The independence of Ghana in 1957 and the 1958 Accra Pan African congress had a positive impact on the growth of Ugandan Nationalism.