This is a very subjective question, leaving people bound to claim their
own country a having the best army in the world. In reality it comes
down to what you define as best.
If you define best as "which
individual Army is most likely to win a war against a foreign power?",
then the answer is undoubtedly the United States. Although they have a
smaller Army than the Chinese in terms of manpower, their technology
is, at this time, far superior making them more likely to succeed in
all out war.
That said, war is rarely straight forward and
allegiances are often formed to bring down a common enemy who could not
be defeated by an individual nation. For example, if the United States
entered into war with A member of the European Union, the other members
would probably come to it's aid. In this situation, the eventual victor
of the conflict would probably be the allied Europeans as together they
have similar technology to the United States but a greater number of
troops and a stronger economy.
If the playing field was level
in terms of man power and technology the situation changes again, with
the emphasis being on the skill of the Individual soldier and the
strategy of the army. Here the British probably excel, having regiments
like the SAS, Royal Marines and Parachute regiment with a reputation
for stringent discipline and intensive training (the Royal Marines have
the longest basic training course of any normal infantry soldiers in
the world at 33 weeks). Of course the US is not far behind with Delta
Force or the Navy SEALs but the size of their special forces makes it
harder to train all of the soldiers to the same level that other
nations may do.
The Gurkhas should probably receive and honourable
mention - they fight as part of the British army but hail from Nepal,
so in a way they could be seen as an unofficial Nepalese army - in
which case they would be the best trained and most skilled of any Army
in the world, although lacking technology and manpower, they have
proved themselves time and again in conflict.
The best army in the world be a combination of the US, British,
Australian and Canadian forces. The UK/Australian SAS and SBS special
forces are simply the best.
When it comes to the best regular troops, I
would have to say it is the Gurkha regiments from Nepal who are part of
the British army. I have heard that during the Falklands War that the
Gurkhas fought the heavily armed Argentinian invaders with their knives
and beat them hands down .
information from wikianswers.