Learn Spanish (Spain): Tras el motín, hoy han derrocado a la reina. - After the mutiny, they have overthrown the queen today.

Both tras and después de mean "after" in this temporal sense, but tras is slightly more formal. It is frequently used in journalistic, historical, or literary contexts, which fits perfectly with a sentence about a mutiny and overthrowing a monarch. Notice that unlike después, tras connects directly to the noun el motín without needing the preposition de.

Why is the present perfect (han derrocado) used instead of the simple past (derrocaron)?

In Spanish from Spain, the present perfect is required when an action happens in a time period that is still ongoing. The word hoy (today) triggers this rule. Even if the mutiny ended hours ago, because "today" isn't over yet, you must use han derrocado.

Who does the "they" refer to in han derrocado?

This is an impersonal "they". When the specific people who did the action are unknown or unimportant, Spanish often uses the active third-person plural. While English speakers might naturally reach for a passive voice ("the queen has been overthrown"), this "impersonal they" structure is much more common and natural in Spanish.

Why is there an a before la reina?

This is the "personal a". Because the queen is a specific, identifiable person receiving the action of the verb derrocar (to overthrow), she requires the personal a, even though she is the direct object of the sentence.