The prosecutor-turned-politician vowed to complete the deployment of an advanced US missile defense system here in the first half of this year and procure more reconnaissance and strike equipment as well as nuclear-powered submarines designed to fend off submarine-launched ballistic missiles from the North.

He also pledged to reorganize the military with the addition of a Marine Corps special warfare command and bolster cooperation with the international community to pressure Pyongyang to abandon its nuclear weapons program.

The firebrand politician has sought to rally the conservative vote at a time when tensions are high over the possibility North Korea could conduct another nuclear test and the US could respond with a pre-emptive strike on the communist country.

On the economy, Hong said he would create more jobs by drastically easing regulations and improve the business environment by reforming powerful and "ideologically biased" labor unions.

In other areas, he promised to expand welfare for average citizens, protect small businesses and invigorate provincial economies, eradicate corruption, improve the environment, nurture a future growth engine in the era of the fourth industrial revolution, and work to raise the low birth rate.

Hong has ranked a distant third behind two liberals in most opinion surveys conducted ahead of the May 9 election. His approval rating has hovered below 10 percent. (Yonhap)