Hong Kong's pro-establishment groups staged a march of their own Sunday opposing Occupy Central, a democratic activist group threatening mass civil disobedience if the Beijing government does not offer the city genuine choice in their next election for Chief Executive, the city's top leader.

The rally, dubbed a "march for peace," was meant to overshadow this year's July 1 pro-democracy march, which drew hundreds of thousands of people. But when the march officially began at 3 p.m. Sunday, about half of Victoria Park,...