For decades, the idea of alternatives to military training — serving as firefighters or in homeless shelters, for example — has been unspeakable in South Korea. The typical 21-month stint in the 650,000-member military has been billed as a “sacred duty” for all able-bodied men — and the price of freedom. When cabinet appointees face confirmation hearings, the first thing lawmakers investigate is whether they or their sons avoided military service.

Yet maintaining a conscript army has become more of a challenge. Postwar generations considered universal conscription an irritating interruption in their careers. They also grew disenchanted with recurring corruption, abuse and disciplinary problems in the military.

“South Korean men don’t want to serve in the military if they have a choice, so they get angry if others don’t while they have to,” said Park Yu-ho, 27, who refused to join the military partly as a protest against recent beating deaths in military camps and shooting rampages by abused soldiers.

Today, conscientious objectors are tried in civilian court and are usually given 18 months in prison. This year, they began to get some support from lower courts, where six of them were found not guilty even though their acquittals were appealed by prosecutors.

The abuse of conscientious objectors was one of the worst and most ignored human rights violations under the military dictatorship of the 1970s. Conscript officials raided Jehovah’s Witness churches to haul away draft-age men. When they refused to take up arms, they were beaten “like punching bags,” according to the presidential commission on suspicious deaths in the military.

In its reports in 2008, the commission attributed the deaths of five Jehovah’s Witnesses between 1975 and 1985 to beatings and torture that were “routine” among boot camp instructors and military policemen handling conscientious objectors.