What is the adverb clause of wind blew softly across the sand dunes as the caravan made its way home?

In the sentence "The wind blew softly across the sand dunes as the caravan made its way home," the adverb clause is "as the caravan made its way home." This clause modifies the verb "blew," indicating the time when the wind was blowing. Adverb clauses provide additional information about the action, such as when, where, why, or under what conditions it occurs.