Tourist said:
Afghanistan, got our ass kicked.
Which particular century? The current one or a previous 'bullying' one when we had a short lived, crippling expensive 'glorious' 'Empire?'
The examples you quote were not lost by the combatants, shame on you for suggesting such. They were lost by the politicians who picked fights we could not win.
As an aside it was the USA bullying of an unaligned nationalist movement in Cuba that led to the revolution and further bullying that led the new regime reluctantly into the hands of the Soviets.
It was political expediency that led to the removal of the missiles. The sum total was decades of resentment by Cubans, a refugee crisis, seperated and estranged families and the accelerated development of ICBMs and SLBMs. Hardly a win.
Training does at times need to be harsh, uncomfortable and difficult, however it does not need to include bullying, which is counterproductive to learning and breeds nought but resentment.