Roy Welensky, as the Prime Minister of the Federation of Rhodesia and Nyasaland, achieved several notable accomplishments during his tenure:

Formation and Stability of the Federation: Welensky played a significant role in the establishment and maintenance of the Federation of Rhodesia and Nyasaland. The federation aimed to bring together the territories of Northern Rhodesia (now Zambia), Southern Rhodesia (now Zimbabwe), and Nyasaland (now Malawi) under a single political entity. The federation was created in 1953 and functioned until its dissolution in 1963.

Economic Development: Welensky prioritized economic development within the federation. He implemented policies to promote infrastructure development, industrial growth, and agricultural expansion. The federation experienced some economic growth during his tenure, particularly in the mining and agricultural sectors.

Strong Opposition to African Majority Rule: Welensky was a vocal opponent of African majority rule. He advocated for the preservation of white minority rule and resisted efforts to grant political rights and representation to the African population. This position, however, was controversial and drew criticism from those advocating for African independence and equal rights.

Advocacy for Federation's Interests: Welensky was a strong advocate for the interests of the Federation of Rhodesia and Nyasaland on the international stage. He sought to secure favorable trade agreements and diplomatic relations, particularly with the United Kingdom, the former colonial power.