The Spanish Civil War served as a lead-in to World War II. What are the chances the Ukraine War will serve as a precursor to World War III?
Both dragged on for years, creating many casualties. Both have served as proving grounds for new military technology. And of course, both had external allies who supported the side more closely allied to their interests.
The Spanish civil war ended on April 1, 1939. Hitler invaded Poland exactly 5 months later on September 1, 1939, beginning World War II.
Anybody want to take bets on the lag time between an end of war in Ukraine and the beginning of the as-yet-hypothetical World War III? At this point I would start with 5 months as an unbiased estimator thereof.
The Spanish war lasted roughly 3 years. Ukraine's war has already lasted ca. 4.5 years and shows no sign of ending.
If the Ukraine war's continuation precludes the beginning of a much wider war, perhaps it is better for most of us if it does not end. For sure the Baltic states (Estonia, Latvia, Lithuania) and Poland could think so. I fear this speculation sounds a bit outré, which doesn't make it any less possible.