This week is the Ukraine war’s first anniversary, but it feels like 10 years, not one. Ukraine “fatigue” is understandable. But let’s try to put the sensation of war fatigue in context. Vietnam came to be known in the 1960s as the television war, shown on the TV news every night. News programs then lasted a half-hour, with Vietnam usually just a segment. Still, the unsettling daily footage eroded public support for the war. Today, with all media on all the time, we are saturated with Ukraine’s war, as we are with mass murders, weather disasters or a train derailment....