This article presents results to date of the Dating Iroquoia project. Our objective is to develop high-precision radiocarbon chronologies for northeastern North American archaeology. Here, we employ Bayesian chronological modeling of 184 AMS radiocarbon dates derived from 42 Northern Iroquoian village sites in five regional sequences in order to construct new date estimates. The resulting revised chronology demands a rethinking of key assumptions about cultural process in the region regarding the directionality and timing of processes of coalescence and conflict and the introduction of European trade goods. The results suggest that internal conflict may have preceded confederacy formation among the Haudenosaunee but not the Wendat, as has been previously assumed. External conflict, previously thought to have begun in the early seventeenth century, began more than a century earlier. New data also indicate that the timing and distribution of European materials were more variable between communities than acknowledged by the logic underlying traditional trade-good chronologies. This enhanced chronological resolution permits the development and application of archaeological theories that center the lived experiences and relational histories of Iroquoian communities, as opposed to the generalized thinking that has dominated past explanatory frameworks.