This document summarizes research on the liquefaction of fine-grained soils. It establishes that fine-grained soils like silts and clays can liquefy under certain conditions. The liquefaction potential of silts changes with plasticity index. There are still anomalies in understanding the effect of fines on liquefaction that require further research, such as the impact of neglecting fines below 5% and the effect of void ratio on soils with low plasticity fines. More experimental studies are needed to clarify these issues.