Doesn’t look like Cuba has much “modern” military hardware to provide. It's interesting that the MiG-21s are part of "defensive weapons".
Late Tuesday, the Cuban Foreign Ministry said in a statement that the ship was carrying 240 metric tons of “obsolete defensive weapons” to be repaired in North Korea and returned to Cuba. It listed the weapons as two Volga and Pechora antiaircraft missile systems, nine missiles “in parts and spares,” two Mig-21 aircraft and 15 engines for the planes — “all of it manufactured in the mid-twentieth century.”
washingtonpost.com