Building on the historical foundations established by Professor M. Gazi Yaşargil and early microsurgical pioneers, as summarized in Part I, this manuscript focuses on the lessons derived from their early experiences and examines how these lessons were translated into guiding principles and contemporary microsurgical training practices. It then describes how these principles informed structured microsurgical training models and were implemented on a global scale through outreach efforts within the Madison Microneurosurgery Initiative. Through basic and advanced equipment donations, offline, live-streamed, and in-person educational support strategies, and sustained mentorship, microsurgical laboratory training has been established in 86 centers across 45 low- and middle-income countries. Our experience demonstrates that effective microsurgical training can be achieved through thoughtful application of foundational principles rather than reliance on high-cost or technologically sophisticated infrastructure. Together, the integration of historical lessons with contemporary application illustrates how Yaşargil's foundational principles continue to guide sustainable microsurgical training across diverse institutional and resource settings.