The general strike has long been an important political instrument of the opposition in Argentina. Since 1983, it’s been used by the unions 42 times.
On a sidenote, this is pretty damning for anyone negating the need of vanguard party. They organised 42 general strikes in 41 years, a supposed ultimate weapon of the working class - and are still in this bog. Sure, they did prevented a lot of worse things coming, but clearly this is still at best the stalemate in class war.