M&A scholars have generally assumed that post-acquisition integration is a self-contained process. However this ignores that this process rarely unfolds as the only ongoing initiative in an organization. We contend that post-acquisition integration is not detached from other simultaneous change processes in the organizational context and this has important implications for our understanding of how integration dynamics actually evolve. To further understand this embeddedness we examine the unfolding of a post-acquisition integration process in a company faced with an unanticipated drop in demand due to the global economic crisis. Through a qualitative, longitudinal study conducted over three years, we carried out 151 interviews to uncover the unfolding of the post-acquisition process. We find that post-acquisition integration is embedded in a set of co-evolving processes. We highlight four mechanisms (coordination, cohesion, disconnection, alienation) that arise from the co-evolution of processes that either facilitate or impede integration. Our findings contribute to our understanding of post-acquisition integration dynamics by recasting the integration process as embedded in a set of co-evolving processes that shape its unfolding.