The nation is holding an election in a electoral process broadly rejected as a farce, with key opposition groups banned, many of their leaders jailed and as much as half of the country unable to participate because of an continuing civil war.
The ruling junta is holding a phased ballot nearly half a decade after it took control in a takeover, which sparked massive protests and escalated into a devastating conflict.
Analysts note the junta, with backing from Beijing, is attempting to validate and entrench its power as it seeks a way out of the costly stalemate.
"The environment does not allow for the exercise of the freedoms of free speech, assembly or peaceful protest," the United Nations' top human rights official Volker Türk said.
Over two hundred people have been prosecuted for disrupting or criticising the polls under a new law which imposes harsh penalties, including the possibility of execution.
Film director Mike Tee, actor Kyaw Win Htut and entertainer Ohn Daing were among the well-known individuals convicted under the law, which was passed in July. They were each handed a prison sentence of seven years after criticising a film endorsing the elections.
Civilians are "facing pressure from all sides," Mr Türk said in a statement, adding that armed rebel groups have made warnings urging people to shun the polls.
The military has been fighting on several fronts, against both pro-democracy fighters who oppose the coup, as well as ethnic armies which have their own forces. It lost control of vast areas of the country in a string of defeats, but regained territory this year after relentless airstrikes enabled by support from Beijing and Moscow.
All of this and the fact that large parts of the country are still under opposition control presents a huge logistical challenge for conducting an election.
The ballot is set to take place in three rounds over the next month in 274 of the country's three hundred and thirty townships, with the remainder deemed not secure enough. Results are expected by late January.
There is unlikely to be any voting in as much as one half of the country. Even in the townships that are voting, some districts will hold elections, making it challenging to forecast a possible turnout.
Six parties, including the junta-supported Union Solidarity and Development Party, are running nominees nationwide, while another 51 parties and independent candidates will compete only at the state or regional levels.
Some 40 parties, including Aung San Suu Kyi's National League of Democracy, which scored landslide victories in 2015 and 2020, have been banned. Suu Kyi and a number of the party's senior figures have been imprisoned under charges widely condemned as politically motivated, while the rest are in exile.
"Through dividing the vote into stages, the junta can change their approach if the outcomes in the first phase do not go their way," noted Htin Kyaw Aye, a spokesman of the election-monitoring group Spring Sprouts.
Western governments, including the UK and the European Parliament, have rejected the vote as a sham, while regional bloc Asean has called for negotiations to come before any election.
The Myanmar regime has rejected criticism of the polls, maintaining that it aims to "return [the country] to a democracy with multiple parties".
"The election is being held for our nation. It is being held for the citizens of this country. It is not intended for the international community," a military representative told a news conference last week.
Junta chief Min Aung Hlaing cautioned earlier this week that those who refuse to vote are turning their back on "progress toward democracy".