Imperial Guards was a Pirates subtheme introduced in 1989 that eventually replaced the Imperial Soldiers as main adversaries of the pirates. Some of the older Imperial Soldiers' sets that were still in production were re-categorized as part of the Imperial Guards faction until their discontinuation in 1995.
1989 LEGO Sets
1989 was a landmark year with the global debut of LEGO Pirates, introducing expressive minifigure faces, large sailing ships, and the Imperials vs. buccaneers conflict. Space Police I launched as a law-and-order counterpoint to Blacktron, while Model Team continued to grow with realistic, detail-rich vehicles for older builders. LEGO also strengthened its education arm under the LEGO Dacta name, reflecting an ongoing commitment to learning through play.