The bulk update request #10170 is pending approval.

create implication ballistic_shield (83) -> shield (6494)
create implication energy_shield (103) -> shield (6494)
create implication heater_shield (23) -> shield (6494)
create implication kite_shield (22) -> shield (6494)
create implication nguni_shield (4) -> shield (6494)
create implication pavise (4) -> shield (6494)
create alias pavise_shield (0) -> pavise (4)
create implication riot_shield (157) -> shield (6494)
create implication round_shield (114) -> shield (6494)
create implication aspis (8) -> round_shield (114)
create alias porpax_shield (0) -> aspis (8)
create implication buckler (102) -> round_shield (114)
create alias buckler_shield (0) -> buckler (102)
create implication targe (9) -> round_shield (114)
create implication scutum (16) -> shield (6494)
create alias tower_shield (24) -> scutum (16)
create alias medieval_shield (39) -> shield (6494)

Reason: The various varieties of shields, are, in fact, shields.

(Medieval shield is too nebulous of a term to be useful)