XLIII International Symposium on Multiparticle Dynamics (ISMD) is an international high-energy conference which attracts theorists and experimentalists with a common interest in reactions involving a large number of particles. 
The Symposium is  organized by the Physics Department of the Illinois Institute of Technology (Chicago, USA) and the HEP division of 
Argonne National Laboratory (Chicago, USA)
        
The web page https://atlaswww.hep.anl.gov/ismd13/