How Long Would World War III Last?
The term “World War III” has been thrown around since as early as 1941, only two years
into the outbreak of World War II.
Since then, the globe has seen war after war, and the creation of ever deadlier technologies.
Arguably, the closest we’ve actually come to a Third World War was during the Cuban
Missile Crisis in 1962, and the “war scare” of 1983.
But with regional tensions constantly escalating, it’s not surprising to see the phrase “World
War III” cropping up more often on social media and in the tabloids.
The belief that humanity is nearing its doom is
far from an uncommon one.
First, let’s look at the phrase “world war”.
Do we mean a conflict in which much of the world is at war, or a war that otherwise affects
the whole world?
Historically, there’s a link between the scale of the previous world wars and colonialism.
Many countries fought on behalf of the empires of Great Britain and France because they were
promised independence.
Today, we don’t have colonial alliances on this scale, and a war involving that many
nations might be unrealistic.
However, if we choose not to define a “world war” as a war that would affect the whole
world, the prospect of a third becomes sickeningly plausible – mainly because of nuclear weapons.
In the decades since the US’ Trinity test was deemed successful in 1945, and the tragic
bombings of Hiroshima and Nagasaki, nine countries have developed nuclear weapons.
The Federation of American Scientists estimates that there are 15,000 nuclear weapons in the
world.
The existence of these devastating warheads has led to widespread speculation and fear
that a Third World War is destined to also be a nuclear one, and also the downfall of
mankind.
It’s often argued that this nightmarish prospect has deterred global conflict; but
the proliferation of nuclear weapons also make such a war much easier to initiate.
All it would take would be one megalomaniac to order the first strike, and the counter-strikes
and resultant fallout, environmental disasters, and economic crash, could be the last nail
in the coffin of our species.
The biggest nuclear weapon in history was the Tsar Bomba, an unrealistically huge Soviet
device designed almost entirely as a publicity stunt.
Despite the impossibility of actually using it in war, when the Tsar Bomba was detonated
in 1961 the mushroom cloud it created was 35 miles high.
It had a nuclear yield of 50 megatons, or 50,000,000 tons; for comparison, Fat Man,
the device dropped on Nagasaki, had a yield of only 21 kilotons, or 21,000 tons.
But the question of how long a Third World War, if it were to be a nuclear war, would
last is both simple and not-so-simple.
From the moment the first bomb is dropped, life as we know it could be eradicated in
a matter of hours, assuming that other nations responded in kind.
In that case, civilisation would be decimated, and the extreme nuclear fallout and radiation
would spread across the globe, bringing about the ruination of humanity no matter how many
countries tried to steer clear of the conflict.
If we also categorise the long aftermath and recovery period as part of the war, well,
it would take centuries or more for the world to come bounce from a nuclear apocalypse,
and the chances of our survival are very small.
Fortunately, bans on nuclear tests, and treaties on non-proliferation, suggest that nuclear
weapons aren’t something that most of the world actually wants to see used.
There’s always the possibility that the anti-war protestors will succeed, and the
planet’s powerhouses will actually disarm – after all, the USSR and USA have both
dabbled in nuclear disarmament in the past, while disarmament dominates peace talks between
North and South Korea.
This means that, for all the talk of nuclear apocalypse, there’s at least a possibility
that another World War might not resort to nuclear weapons.
If this is the case, our prospective estimate for the conflict’s duration begins to steadily
extend.
Without the potential for enormous weapons of mass destruction, any global war would
become a huge quagmire.
Historically, wars are only getting longer and longer; World War I was four years, World
War II six.
But the Vietnam War, characterised by its brutal and unconventional guerrilla warfare,
lasted for two decades, while the “War on Terror” – which has itself been dubbed
World War III on occasion – has been steadily continuing since 2001.
The Third World War is bound to be highly complex, with multiple contributing causes,
and these complexities will serve to make it longer and more drawn out – more so if
countries are relying on conventional fighting.
Even with the involvement of an advanced military of a country like the United States, which
has the largest and most powerful non-nuclear arsenal of weapons, a global conflict could
still last for decades; again, guerrillas in Vietnam were severely outmatched by US
marines, but ultimately forced the US to withdraw.
But this doesn’t mean that a war on this scale, even using conventional weaponry, doesn’t
have the potential to be just as deadly; it might just take more time to reach an equivalent
death toll.
A conventional war would also be exacerbated by the sheer volume of resources consumed
by modern warfare, and the fact that during a worldwide conflict it would be next to impossible
to continue to manufacture supplies.
Soldiers, weapons, food and medicine would all begin to dwindle sickeningly quickly by
regular, ballistic attacks.
With all of this in mind, the answer to the question, “how long would World War III
last?”
becomes horribly clear: for mere hours, in the case of a nuclear war, and for decades
in the case of a conventional one.
Of course, this is still only speculative; we can only hope we never find out how long
a Third World War will last, because regardless of what kinds of weapons are used or how many
countries are involved, widespread destruction and tragedy are the only real certainties.