This chapter examines the trajectory of Zionist political, economic, and social growth in Palestine before, during, and after World War I, highlighting the transformative impact of the war on Zionist aspirations and infrastructure. The chapter begins by examining the early stages of Zionist settlement and land acquisition strategies, with particular emphasis on establishing agricultural colonies and the socio-political implications of these settlements for establishing Jewish and Arab populations. It then explores the role of European powers, particularly Britain, in facilitating Zionist objectives, culminating in the Balfour Declaration of 1917, a watershed moment in Zionist history. The chapter also considers the strategic alliances Zionist leaders forged during the war and the immediate post-war period, including the evolving dynamics between the Ottoman Empire, Allied forces, and the emerging mandate system under British governance. Through a nuanced analysis of primary sources and historical narratives, the chapter sheds light on the tensions between Arab nationalist movements and Zionist expansion, setting the stage for the broader political and social conflict that followed. The focus on this critical period reveals the foundations of Zionist state-building efforts and their long-term consequences for the Palestinian question.