French President Emmanuel Macron heads to Moscow on Monday hoping to reach a deal with Vladimir Putin over Ukraine, at the start of a week of intense diplomacy over fears Russia is preparing an invasion of its pro-Western neighbour. With tens of thousands of Russian troops camped on the border with Ukraine, Macron will be the first top Western leader to meet with Putin since the crisis kicked off in December. German Chancellor Olaf Scholz will also meet Monday with US President Joe Biden in Washington, as Western leaders look to maintain a united front in their biggest showdown with Russia since the end of the Cold War. US officials say Russia has assembled 110,000 troops on the border with Ukraine and is on track to amass a large enough force — some 150,000 soldiers — for a full-scale invasion by mid-February. Russia insists it has no plans to attack and has instead put forward its own demands for security guarantees that it says would ease tensions. Macron, who will head to Kyiv on Tuesday for talks with Ukrainian President VolodymyrZelensky, said before leaving Paris that he would be looking to find “historic solutions” with Putin. “We will discuss the terms of de-escalation,” Macron told newspaper Le Journal Du Dimanche, saying Russia’s objective was “clearly not Ukraine” but new agreements on security with NATO and the European Union. “The security and sovereignty of Ukraine or any other European state cannot be compromised, just as it is legitimate for Russia to raise the question of its own security,” Macron said. Moscow has accused the West, in particular Washington and NATO, of ignoring what it says are legitimate concerns for its security. It is demanding a permanent ban on Ukraine, a former Soviet republic, joining the US-led NATO military alliance and that the bloc roll back its military presence in eastern Europe. Kremlin spokesman Dmitry Peskov said Monday’s talks between Macron and Putin were “very important” but suggested no one should expect a major step forward. “The situation is too complex to expect decisive breakthroughs in one meeting,” Peskov told reporters. Macron, whose country currently heads the European Union and who is facing a re-election challenge in April, has tried to position himself as the key European figure in negotiations with Russia. He has spoken to Putin by phone several times over the past week and held a 40-minute call with Biden on Sunday. Macron is expected to push forward a stalled peace plan for the festering conflict with Russia-backed separatists in eastern Ukraine, and could make offers to Russia for consultations on arms control and NATO expansion.