Looks like it's already a global war considering Russia has to rely on North Korean forces and Iranian, Chinese weapons. 
https://www.youtube.com/watch?v=TpQ_WvqeXfI
 Iranian-made Shaheen missiles. This attack highlights the deepening 
military collaboration between Russia and Iran. As the prolonged war 
grinds on, Russia has increasingly leaned on allies like Iran, China, 
and North Korea for supply of arms—nations united in their challenge to 
the U.S.-led global order. 
“Russia cannot continue waging the current war beyond late 2025, when it will begin running out of key weapons systems.”
Fortune, November 24th, 2024.   
Alexander
 Mertens, a professor of finance at the National University of 
Kyiv-Mohyla Academy, explained how Russia can’t produce enough to 
replace what it’s losing on the battlefield.
For example, the military is losing about 320 tank and artillery cannon 
barrels a month, while Russian factories can produce only 20 each month,
 forcing the Kremlin to dig into aging Soviet stockpiles. But that’s not
 enough, and Russia will run out of barrels sometime in 2025, In 
addition, Russia is losing about 155 infantry fighting vehicles a month,
 but its defense industry can make only 17 a month. The 
supply-and-demand economics of artillery shells and troops are also 
unsustainable. 
https://www.youtube.com/watch?v=Nwgh8yHh2Mw
https://www.youtube.com/watch?v=EKEBgbHS-AI
https://www.pravda.com.ua/eng/news/2024/11/23/7485972/
"Russia has been using ballistic missiles throughout this war, but 
this is alleged to have been an intercontinental ballistic missile – 
which normally has a different use, which, if it is the case, is on the 
one hand an escalation and a signal, but on the other hand also an act 
of desperation that Putin is unable to win in this war," he said.
Sikorski added that he is currently observing the Russian economy 
experiencing "real stress". He also noted reports of desertions among 
Russian soldiers, emphasising that "inviting mercenaries from North 
Korea is not exactly a sign of strength".
 
Russia will have moved some of its critical capabilities beyond their 
reach – and done so probably well before Biden’s decision. ...
The use of just six ballistic missiles, albeit in combination with a 
large number of drones, might be an indication that Ukraine, for now at 
least, has relatively limited stock of these missiles and cannot commit 
them in large numbers to individual strikes....
Given that the Ukrainian attack, according to Russian reports, caused no
 damage, this is highly unlikely....
air defence systems intercepted five and damaged one.
following the Biden administration's announcement, the French daily Le 
Figaro reported that the U.K. and France said they, too, would allow 
Ukraine to use their Storm Shadow and SCALP missiles to strike inside 
Russia. That will put pressure on Germany, which has so far refused to 
deliver its Taurus missiles to Ukraine.
Chinese and Indian warnings to Russian President Vladimir Putin not to 
cross the nuclear red line....Only railroads can fill the demand, and 
railroads are vulnerable to 
long-range strikes. Physical infrastructure—track, bridges, tunnels, 
switching stations, engine yards, diesel fuel depots—can be struck and 
restruck to isolate the occupying Russian army. 
 
Furthermore, Biden’s decision releases any constraints on Britain or 
France supplying SCALP/Storm Shadow air-launched missiles, which could 
be effective when used alongside the ground-launched ATACMs. However, 
all the relevant weapon systems have a range of only a few hundred 
kilometres – for example, 300km for ATACMs – meaning they are incapable 
of striking too deep into Russian territory. 
Pentagon spokesperson Sabrina Singh said Russian officials warned the
 U.S. of the launch through nuclear risk reduction channels. That helped
 ensure that it wasn't misidentified as an intercontinental ballistic 
missile and therefore a possible nuclear threat.
While Russia 
already has sufficient weapons in its arsenal to strike NATO partners, 
Poland is particularly unnerved by these new developments. Polish Prime 
Minister Donald Tusk said there is a "serious and real" threat of global
 war. Ukrainian President Volodymyr Zelenskyy called it a "clear and 
severe escalation" by Russia. Zelenskyy accused Putin of using Ukraine 
as a "testing ground." 
 
 Polish Prime Minister Donald Tusk stressed that "the events of the last
 few dozen hours" point to a "real threat of global conflict". 
 the missile defense base in Poland has long been included among the 
priority targets for potential neutralization. If necessary, this can be
 achieved using a wide range of advanced weaponry," Zakharova 
claimed, according to an article by Russian state-owned news agency TASS. 
 I’ve said before, if Russia attacks Poland, we’ll strike targets in 
St. Petersburg. I’ll do everything to avoid it, but if necessary, we’ll 
act.
Poland is buying 800 missiles and preparing its army because 
we understand Russia’s language. Ukraine’s Western partners must also 
understand that withholding permissions or weapons won’t help.
https://euromaidanpress.com/2024/11/26/us-says-it-takes-russian-threats-to-strike-new-american-base-in-poland-seriously/
Polish Foreign Ministry Spokesperson Paweł Wroński stressed the 
Polish base in Redzikowo is purely defensive, set up to counter 
ballistic missile threats, according to RMF24.
Wronski added that if Russia continues its threats,
 the US and NATO may need to bolster air defenses along the Alliance’s 
eastern flank.
https://www.bbc.com/news/articles/cjr4pr0gyyzo
more than a dozen different North Korean oil tankers arriving at an oil 
terminal in Russia’s Far East a total of 43 times over the past eight 
months. 
 Pyongyang was sending Moscow weapons. 
The shipments have continued as thousands of North Korean troops are reported to have been sent to Russia to fight, with the last one recorded on 5 November.
“While
 Kim Jong Un is providing Vladimir Putin with a lifeline to continue his
 war, Russia is quietly providing North Korea with a lifeline of its 
own,” says Joe Byrne from the Open Source Centre. 
Its biggest worry is that Moscow will provide Pyongyang with technology to improve its spy satellites and ballistic missiles. 
Last month, Seoul’s defence minister, Kim Yong-hyun, stated there was a “high chance” North Korea was asking for such help.
“If you’re sending your people to die in a foreign war, a million barrels of oil is just not sufficient reward,” Dr Go says.
https://apnews.com/article/north-korea-russia-ukraine-artillery-f16f8a95fc6b4314c52d4a9271c3632d
 the National Intelligence Service said that North Korea exported 170mm 
self-propelled guns and 240mm multiple rocket launch systems to Russia, 
according to lawmaker Lee Seong Kweun, who attended the meeting. 
North Korea likely dispatched personnel to teach the Russians how to use them and handle their maintenance.
Last
 week, Russian Telegram channels and other social media posts published 
photos apparently showing North Korean’s “Koksan” 170mm self-propelled 
guns being moved by rail inside Russia. The Financial Times, citing 
Ukrainian intelligence assessments, reported Sunday that North Korea in 
recent weeks sent some 50 domestically produced 170mm self-propelled 
howitzers and 20 240mm multiple launch rocket systems to Russia.