Riots

thumb|Teamsters, armed with pipes, riot in a clash with [[police in the Minneapolis Teamsters Strike of 1934 during the Great Depression.]]

A type of hand-to-hand combat

Tawuran (or tubir) is a form of customary mass street fighting between gangs of particular school related students in urban Indonesia, especially in the capital city Jakarta. It is practised largely by males in their junior or senior year of high school. This is also popular around Greater Jakarta, where schools often form factions or groups to oppose each other. It's not uncommon for multiple schools to be involved in a single campaign.