It is possible to attack or even invade another country without declaring war. Both Iraq wars and the war on Afghanistan were not preceded by a formal declaration of war. It is also sometimes necessary to attack in response to an attack against your homeland.
IMO, Milly was basically inviting a preemptive strike by China against the US.
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Trump had a goal to leave Afghanistan within a certain timeframe. Trump was not going to leave Afghanistan without the conditions in Afghanistan being appropriate.
funny part is when US/UK invaded both iraq and afghanistan.. it was declared.
after 9-11, i remember bush clearly saying about sending the troops in. .. and then the troops moved in.
why. because then it makes it a legal war. as oppose to an illegal war
no warning is an illegal war.
its why when china spot america ships just outside the china territory line in the ocean and if they see a ship cross it without declaring their intentions, china see that as an illegal violation of peace treaties and international law. china could treat that as an 'act of war' to allow china to legally then declare war on the US. so the US dont cross the border for no reason. unless they inform china first.
as for trump.. it wasnt an opinion or an idea.. he actually signed an executive order to withdraw from afghanistan. the order included allowing the taliban to take over to avoid al-queda taking over. that was his condition.
please try doing some research, its not that difficult.
if your wiling to spend multiple posting time to argue stuff you heard on fox news. atleast turn off your TV and use that time to research the bits you missed in the first post