Up for grabs are 123 seats in parliament, with some 9.6 million people are expected to vote - many of them for the very first time.
...
The Cambodian People's Party (CPP), run by Prime Minister Hun Sen, has been campaigning on a platform of continued development and stability.
...
But Hun Sen has also regularly been accused by human rights groups of keeping a tight grip on power by clamping down on any form of dissent.
...
As separate entities, they were no match for the might and political machinery of Hun Sen's ruling CPP. But by joining forces, the CNRP is posing the biggest challenge to the current regime that Cambodia has seen in decades.

http://www.bbc.co.uk/news/world-asia-23461127