The activists last evening marched peacefully to Bangkok's Democracy Monument, a symbolic location that has become a rallying point for protests in recent years. They carried anti-junta banners and shouted pro-democracy slogans as a ring of police kept watch but did not break up the rally.
The demonstration started with a forum at Bangkok's Thammasat University that was allowed by authorities, but they denied a request for a march outside of the campus.
Last year, the army overthrew an elected government run by Thaksin's sister, Yingluck Shinawatra, on the pretext of restoring order and reconciling the politically divided country.
Yesterday's protest also appeared designed at least in part to embarrass the current leader, army chief-turned-Prime Minister Prayuth Chan-ocha, who is scheduled to make an address this month at the UN General Assembly in New York.
After initially promising quick elections to restore democracy, Prayuth now says polls will not be held until at least 2017.