As CBS News correspondent Ramy Inocencio reports, Hong Kong has been rocked by protests, violence and chaos since June 9. What started as public opposition to a proposed change in extradition rules exploded into anger and calls for the resignation of the city’s chief executive. Protesters have demanded an investigation into police brutality and advocated for greater democratic reforms. The unrest has raised questions about whether China might deploy the People’s Liberation Army or the People’s Armed Police, a paramilitary force, in the heart of the city to silence the dissent.The protests, which have been marred by violence, took a peaceful turn over the weekend as more than 1.5 million took to the streets to form a human chain in defiance of Beijing and the Hong Kong administration it backs. 
Another massive rally planned for this weekend, which would have seen demonstrators march to the government liaison office, was banned on Thursday by the Hong Kong police – the first time the police have taken such a measure. The protesters have appealed the decision. Video broadcast on China Central Television showed a long convoy of armored personnel carriers and trucks crossing the border over Wednesday night, and troops in formation disembarking from a ship. Earlier, scores of soldiers ran in unison onto trucks, which the state broadcaster said were bound for ports and entry points into Hong Kong.  “This time the task has a glorious mission. The responsibility is great. The job is difficult,” an unnamed major said to troops before they departed. “The time for a true test has arrived!”The official Xinhua News Agency said it was the 22nd rotation of the People’s Liberation Army’s garrison in Hong Kong. The previous one was in August 2018.The Hong Kong garrison earlier published a promotional video with scenes of soldiers facing off with people dressed like protesters.Chinese Defense Ministry spokesman Ren Guoqiang told reporters in Beijing on Thursday that the demonstrators must abide by Hong Kong’s laws.