Complex sentence: Later, it drew attention for being the registrant of the ill-fated SS "Mayagüez", whose seizure by Khmer Rouge forces on May 12 1975 provoked the last armed confrontation of the Vietnam War.
Split into simpler sentences: Later, it drew attention for being the registrant of the ill-fated SS "Mayagüez", which was seized by Khmer Rouge forces on May 12 1975. The Mayagüez incident provoked the last armed confrontation of the Vietnam War.