This book constitutes the proceedings of the 11th International Conference on Modelling and Simulation for Autonomous Systems, MESAS 2024, which took place in Chania, Crete, Greece, during October 1-3, 2024.

The 16 full papers included in this book were carefully reviewed and selected from 23 submissions. They were organized in topical sections as follows: M&S of Intelligent Systems - R&D and Application; Future Challenges of Advanced M&S Technology; and AxS/AI in Context of Future Warfare and Security Environment.