The other lesson to be learned is that you must totally destroy your enemies to end the fight. A bloody nose will not do.
WWI was a bloody nose for Germany. The population never saw their neighborhoods blown up and blood in the streets. They eagerly marched off to war again just 20 short years later.
WWII delivered a decisive and devastating defeat, the effect of shock and awe has not been forgotten. Same goes for Japan.
Nothing else has ever been proven to work.
If Israel doesn’t wipe its enemies off the map, they will win in the end.
That is why Israel has the atomic and hydrogen bomb.