The volcano was last active between 500,000 and 300,000 years ago.

He was the most active between the late 1980s and early 2000s.

The company was active between 1951 and the 1970s.

The group was active for seven years, between 1980 and 1987.

The group was most active between 1997 and 1999.

Active between 1899 and 1962, the fort was then purchased by the town for about $200,000.

The group was active between 1967 and 1969, before reforming in the mid-1990s.

This trio was active almost 10 years between 1980 and 1990.

An educational exchange program has been active between the two towns since 1986.

Red Shift was a video game publisher active between 1983 and 1985.