A historical event can reshape the conditions under which music is composed, performed, restricted, circulated, or remembered. Wars, social movements, public celebrations, and institutional changes leave traces in lyrics, repertories, and media, although recordings referring to an event were not necessarily made while it occurred. This category gathers materials associated with particular episodes of Mexican history and their different sonic representations. Interpretation benefits from distinguishing the date of the event, the date of the performance, and the perspective expressed by its authors or performers.