Russians are saying that now, as ur history is very weak so, let me remind you it is the same Russia, which used to called USSR and was a super power, they disintegrated...
So now same Russians were very happy when Americans entered in Afghanistan back in 2001, and now they are saying that America may disintegrate in coming years... for ref... do some goggling...
USSR disintegrated because Russia forcefully created a union of neighboring countries in 1920 after the end of the Russian Civil War calling it the USSR
Each of those countries wanted independence after the fall of the Berlin Wall.
Is there such a thing in USA?
Are there any serious independent movements in USA?
USA had plenty of times to break apart but it didn't as the examples I have cited above
Canada has a better chance of breaking apart with Quebec and Western Canada movements to separate than USA
As for Afghanistan causing the USSR to fall apart. That is another myth conjured up jihadists. The USSR Economy, coupled with their massive defensive expenditures, coupled with their bad harvests, caused a shortage of goods in stores in USSR.
USSR had 2 Armies in Afghanistan, in total 80,000 men of those 16,000 were killed. USSR's Military Man Power was over 6 Million.
So Afghanistan did not cause USSR to fall apart. Their internal policies and economic and defense expenditures did.
Obviously you have been brainwashed since childhood into believing this nonsense.
Talking to you is like trying to convince a person from the 10th century that the World is Round.