The nation is holding an election in a electoral process widely dismissed as a farce, with major political parties banned, numerous figures jailed and a significant portion of the country unable to participate because of an continuing internal conflict.
The military government is holding a staggered election nearly five years after it seized power in a takeover, which ignited widespread opposition and escalated into a civil war.
Observers say the junta, with China's support, is seeking to legitimise and consolidate its power as it seeks a way out of the devastating deadlock.
"There are no conditions for the exercise of the freedoms of free speech, association or peaceful assembly," UN High Commissioner for Human Rights Volker Türk stated.
More than 200 people have been charged for disrupting or opposing the polls under a new law which imposes harsh penalties, including the possibility of execution.
Director Mike Tee, actor Kyaw Win Htut and entertainer Ohn Daing were among the well-known individuals convicted under the law, which was enacted in July. They were each given a seven-year jail term after criticising a film endorsing the elections.
Civilians are "facing pressure from all sides," Mr Türk noted in a statement, pointing out that armed rebel groups have made warnings asking people to shun the polls.
The army has been fighting on several fronts, against both pro-democracy fighters who reject the coup, as well as ethnic armed organisations which have their own forces. It lost control of large parts of the country in a series of major setbacks, but clawed back territory this year following 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 operational hurdle for holding an election.
The ballot is set to take place in three rounds over the coming weeks in two hundred and seventy-four of the country's 330 townships, with the remainder deemed not secure enough. Outcomes are expected around the end of January.
There is not expected to be any voting in as much as one half of the country. Even in the townships that are voting, some districts will go to the polls, making it difficult to predict a likely turnout.
A handful of parties, including the junta-supported Union Solidarity and Development Party, are fielding candidates nationwide, while another 51 parties and independent candidates will contest only at the state or regional levels.
Approximately forty groups, including Aung San Suu Kyi's National League of Democracy, which achieved decisive wins in 2015 and 2020, have been dissolved. Suu Kyi and a number of the party's senior figures have been imprisoned under charges broadly viewed as fabricated, while the rest are in exile.
"Through dividing the vote into phases, the authorities can change their approach if the outcomes in the first phase do not go their way," commented Htin Kyaw Aye, a representative of the watchdog group Spring Sprouts.
Western governments, including the United Kingdom and the EU legislature, have rejected the vote as a sham, while neighbouring group Asean has urged negotiations to precede any election.
The Burmese junta has rejected criticism of the polls, maintaining that it aims to "restore a democracy with multiple parties".
"This vote is being held for our nation. It is being held for the people of Myanmar. It is not being held for the outside world," a junta spokesman told a briefing last week.
Junta chief Min Aung Hlaing cautioned earlier this week that those who choose not to participate are turning their back on "progress toward democracy".