Thailand's military government said Monday it would send home 100,000 refugees who have been living in camps for two decades and more along the border with Myanmar, a move rights groups say would create chaos at a tense time for both nations.

Thailand's military overthrew the remnants of an elected government in May after months of sometimes violent street protests. Its National Council for Peace and Order has rolled out a raft of tough measures it says are needed to restore order and has promised a return to democracy next year.

Myanmar is emerging from nearly five decades of isolation under repressive military rule. Its nominally civilian government has talked about repatriating the refugees, but non-governmental organizations say they are concerned by a lack of infrastructure to help returnees rebuild their lives.