I guess you’re forgetting about Afghanistan, huh
We've been down the Afghanistan path before.. Most of the world participated in Afghanistan.. it was not just NATO..
Australia
Jordan
Georgia
New Zealand
Sweden
Finland
South Korea
UAE
Azerbaijan
Bosnia
Ireland
Maylasia
Singapore
Tonga
El Salvador
Colombia
Macedonia
Switzerland
Ukraine
Kyrgestan
Tajikistan
Turkmenistan
Uzbeckistan
Pakistan
Japan
Egypt
and even RUSSIA
all participated to one degree or another.. NONE of those countries were members of NATO at the time they were involved in Afghanistan... None of them had an obligation to the US.. and most of the NATO members participating got involved for reasons not related to the US..
some of the countries listed above are not even remotely friendly toward the US.. many of those countries do minimal trade with the US.. and again, NONE of them were bound by any treaty, pact, alliance, or otherwise..
The world participated in Afghanistan because the world recognized it was in the worlds best interest to rid itself of the problem of Al Queda... The world participated in Afghanistan because many of those countries saw it as an opportunity to field test their troops and equipment in a tough environment and prove their battle readiness and to battle harden them (believe it or not, a lot of people in the military, regardless of which country they serve, WANT to go to war.. they are warriors.. its what they train their entire lives for.. they want to be proven.. and their countries want to know they are capable if/when the time comes and they are needed)..
Lets not forget that prior to the invasion in 2001, Al Queda had attacked not only the US, but had also attacked Germany and France (France multiple times)..
Plots were foiled where Al Queda planned on attacking Canada, Spain, and the UK.. Al Queda actively participated in the Bosnian war.. They supported militants in Russia (specifically Chechnyia)..
If you think everyone jumped in solely because of some loyalty to the US or even NATO.. youre fooling yourself..
Canada specifically knew it would be attacked sooner or later by Al Queda (again, multiple plots had already been foiled prior to 2001)..
And.. if we want to play the "remember Afghanistan" game... I'd ask, where was Canada and most of NATO in Iraq? Where was France? What about Germany? how about Belgium?
Article 5 was invoked on Sept 12, 2001.. All 18 members of NATO unanimously voted in favor.. there was not a single vote of dissent.. everyone WANTED to take out Al Queda.. it was in each countrys national interest and in the collective interest of all of NATO..
Iraq was a "coalition of the willing".. the US literally said they would accept the assistance of anyone that wanted to be involved..
And the most of the largest militaries in NATO outside of the US chose to sit on the sidelines..
While, oh by the way, several NON NATO countries did get directly involved in Iraq... Australia, Ukraine, El Salvador, South Korea, Mongolia, Azerbaijan, and Kazakhstan, Japan, and many others (43 nations in total) all fought in Iraq... but.. again... Germany, France, Canada, and Belgium.. all NATO members.. all large forces in NATO.. sat it out..
In fact, Canada went so far as to declare it would not go to Iraq unless the UN mandated it...