What happened at the anti-establishment rally on Sunday

Here is a timeline of events on Sunday:
2.20pm: REDEM protesters gather at Victory Monument.
3.15pm: A superintendent from the Phaya Thai Police Station inform the group of the Public Assembly Act, but the protesters bang utensils in response.
3.30pm: Protest leaders lead the crowds to Prime Minister Prayut Chan-o-cha’s Army residence at the First Infantry Battalion of the Royal Guards on Vibhavadi Rangsit Road.
4pm: Two water trucks are deployed at the Veterans General Hospital and Sutthisan intersection. Pol General Krisana Pattanacharoen, deputy spokesman of the Royal Thai Police, warns protesters to maintain peace.
5pm: Protesters begin marching down Vibhavadi Rangsit Road, shouting for Prayut’s resignation.
6pm: Riot police crackdown on protesters as they try to dismantle containers and barbed wire near the Veterans General Hospital.
6.10pm: A military officer warns protesters to stay away, but the crowd continues dismantling blockade until they arrive at the entrance of the 1st Infantry Battalion compound.
6.30pm: Police officers start arresting protesters, while protest leaders instruct those dismantling containers to deal with the police.
6.45pm: Male protesters confront riot police, while some lob firecrackers at the officers. Some protesters also use canvas to protect themselves from tear gas.
6.55pm: Riot control police retreat and protesters escape the tear gas.
7pm: Protesters’ medical team negotiates with police to avoid confrontation.
7.22pm: Clash erupts as protesters begin throwing objects, including firecrackers, at police who respond by shooting rubber bullets at the crowd.
7.44pm: Police officers say they will stop shooting if protesters retreat, but the crowd continues with its bid to enter the compound and make its way to Prayut’s residence.
7.50pm: Some protesters enter the 1st Infantry Battalion compound.
8pm: Riot police train water cannons and tear gas at protesters from the Veterans General Hospital and Sutthisan intersection.
8.30pm: Protesters vote via messaging app Telegram to call off the rally, though some continue confronting police.
9.35pm: Police once again fire water cannons and tear gas at protesters, who begin retreating.
10.20pm: National Police chief Pol General Suwat Jangyodsuk has the crowd under control outside Veterans General Hospital.
10.30pm: Several protesters were arrested. According to the Thai Lawyers for Human Rights, at least 20 protesters including a 16-year-old had been arrested.
11.20pm: Erawan Emergency Medical Service Centre reports at least 16 injured during the protest.
12am: Riot police shift to Din Daeng Police Station where protesters gather in support of those arrested earlier.
2.30am: Crowds disperse.