Voltron was an animated TV series aired between 1984 and 1985 with over a hundred episodes. It was a Japanese-American co-production. The Voltron robot (GoLion in Japan) was the product of the combination of five mechanical lions, the Lion Force, piloted by human characters, Keith, Lance, Pidge, Hunk and Princess Allura. Their mission was to avoid the conquest of the planet Arus by the evil King Zarkon. Basically, it was an animated version of the Super Sentai japanese series.
The first line of toys was released by Popy in Japan in 1984 and distributed by Matchbox in the USA. This page advertises the second line of action figures, released by Panosh Place the same year.