On this day in rock history, a quintet of heavy rock albums were all released in 1990. And there was an onstage scuffle between police and one of the counterculture's most important bands.

In 1972, a Jefferson Airplane concert at the Rubber Bowl in Akron, Ohio, had a particularly large police presence due to a bomb threat. Fans reacted to this by throwing rocks at the cops, who fought back by teargassing the crowd. The band sided with their fans, with bassist Jack Casady referring to the authorities as "pigs," which led to officers going onstage to arrest him. A fight broke out, and guitarist Paul Kantner was knocked to the ground and singer Grace Slick was maced.

Ratt capped off their most popular era with Detonator, their fifth album in six years. Firehouse rode the hair metal boom to double-platinum glory on their self-titled debut, largely on the strength of the power ballad "Love of a Lifetime." Anthrax put out their most successful works with Persistence of Time. Also, two bands that bridged the gap between hard rock and alternative released albums on Aug. 21, 1990: Alice in Chains with Facelift and Jane's Addiction with Ritual de lo Habitual.

And Scandal featuring Patty Smyth took their career one step further when they released the Warrior album in 1984. The collection of radio-friendly rock tunes, like the smash hit title track, grazed the Top 20 and eventually went platinum.

Watch an exciting recap of many of the day’s biggest rock anniversaries above, narrated by our radio host Zach Martin. And learn more about these important events by clicking the links below.

News Anniversaries:
Police interrupt a Jefferson Airplane concert in Akron, Ohio (1972)

Album Anniversaries:
Scandal featuring Patty Smyth, Warrior (1984)
Ratt, Detonator (1990)
Alice in Chains, Facelift (1990)
Firehouse, Firehouse (1990)
Anthrax, Persistence of Time (1990)
Jane's Addiction, Ritual de lo Habitual (1990)

See Alice in Chains and Other Rockers in the Top 100 Albums of the '90s