US–Russia tensions have intensified after the expiry of the New START nuclear treaty, ending decades-long limits on strategic weapons.

US–Russia tensions grow after New START treaty expiry and Russian oil disputes, raising global security concerns and fears of a new arms race.
US-Russia Tension: The United States and Russia entered another phase of increased tensions after the New START treaty expired, which was their last nuclear arms control treaty. The world now faces rising worries because the United States and Russia fail to resolve their disagreements about Russian oil, Ukraine, and global security matters.
The New START treaty, which both the US and Russia signed in 2010, restricted their strategic nuclear warheads and delivery systems to specified quantities. It served as the main mechanism to prevent nuclear stockpiling until more than ten years had passed. The treaty ended on Wednesday, which marked the end of more than five decades of nuclear arms control between the two Cold War partners.
The US did not respond to President Vladimir Putin's proposal, which requested a 12-month extension of missile and warhead limits, according to Russian officials. Moscow has accused Washington of not showing seriousness in maintaining arms control. Russia announced that both countries can develop their nuclear weapons without restrictions after the treaty expired.
Experts predict that direct US-Russian warfare will not occur within the next few years despite the intense verbal disputes between the two nations. Russia has expressed its willingness to engage in security discussions; however, it will respond to any future dangers that emerge. Nuclear war would produce catastrophic outcomes, which both sides recognize, according to analysts.
As per the experts, a new nuclear arms race is the most serious threat, which they consider to be the greatest danger. The two countries will enlarge their nuclear weapon stockpiles because they lack official restrictions and inspection processes, which will lead to increased worldwide instability and the chance of operational mistakes.
Russian oil export restrictions, which the US imposes because of the Ukraine conflict, have created additional diplomatic problems between the two countries. Energy sources and geopolitical matters, together with security concerns, now form an unbreakable bond.
The US and Russia do not face an immediate war threat, yet the New START treaty termination presents a hazardous situation for world security. The world needs refreshed diplomatic discussions to prevent an arms race and maintain strategic balance.