Russia is continuing to make advances in Ukraine with devastating missile attacks striking cities like Kyiv, Kharkiv and Mariupol three weeks into the conflict, its military adopting brutal siege warfare tactics similar to those it has deployed in the past in Chechnya and Syria.
Ukraine’s president Volodymyr Zelensky meanwhile continues to lead by example from the streets of the capital, tirelessly rallying the international community for support, as his people stage a courageous street-level fightback against Russia’s armed forces as best they can.
At the country’s western border, an estimated 3m people have fled for neighbouring Poland, Hungary, Slovakia, Romania and Moldova, creating a major humanitarian crisis.
US president Joe Biden, UK prime minister Boris Johnson and UN secretary general Antonio Guterres have joined other global powers in condemning Moscow’s “unprovoked and unjustified” attack and promised to hold it “accountable”.
Tough economic sanctions have been issued by the allies against Russian banks, businesses, politicians and oligarchs as western corporations withdraw the country, its sports stars are banned from international competitions and Mr Putin finds himself presiding over a pariah state on the world stage, fighting to shield his own citizens from the truth by silencing and suppressing media freedom and legitimate protest.
Nato continues to extend diplomatic support, aid and weapons to Ukraine but refuses to impose a no-fly zone over the country for fear of being drawn into a much larger war over Eastern Europe, leaving the country in a lonely fight to retain its independence.
Although Russia’s military is significantly larger than Ukraine’s in every area, President Zelensky’s forces still pose a threat and at the very least can mount a defence against Russia’s ongoing invasion as the world has seen in the last six days.
Here’s a look at the combatant’s comparative capabilities.
How big is Ukraine’s air force?
According to the Flight International 2022 World Air Forces database, Ukraine’s Air Force has 210 military aircraft including 98 combat aircraft.
These consist of Soviet-made MiG-29s and three types of Sukhoi jets.
However, Russia has a significantly larger military air force with active aircraft totalling 3,863, according to Flight International’s database, with almost 15 times more combat planes than Ukraine.
Despite its smaller arsenal, Ukraine’s ministry of defence have reported that, as of 1 March, it has downed 29 Russian aircraft, 29 helicopters and seven air defence units.
How big is Russia’s army?
Since 2014-15, Ukraine has tripled its defence budget in an attempt to improve its military and also comply with standards demanded to join Nato as an entry requirement.
The increased investment has helped Ukraine’s army measure up to Russia, although it currently has just 125,600 soldiers compared to Russia’s 280,000.
In terms of total military personnel, Russia’s 900,000 active men and women trumps Ukraine’s 196,600.
Ukraine also has 900,000 reserve personnel – those who have received military training in the last five years – compared with Russia's two million.
They have more than three times the amount of artillery, six times the number of tanks and almost seven times more armoured vehicles than the Ukrainians.
The Russian navy operates 74 warships and 51 submarines, compared with Ukraine's two warships.
Military analysts say Ukraine's anti-aircraft and anti-missile defences are weak, leaving it highly vulnerable to Russian strikes on its critical infrastructure.
They say Russia would also seek to use its superiority in electronic warfare to paralyse its adversary's command and control and cut off communications with units in the field.
What weapons does Ukraine have?
Several western nations have come to the aid of Ukraine to bolster its military defences.
The US has provided more than $2.5bn (£1.87bn) in military aid since 2014, including Javelin anti-tank missiles, coastal patrol boats, Humvees, sniper rifles, reconnaissance drones, radar systems, night vision and radio equipment.
Turkey has sold Kyiv several batches of Bayraktar TB2 drones while Britain supplied Ukraine with a reported 2,000 short-range anti-tank missiles in January and sent British Army specialists to deliver training.
Here’s a list of some of the weapons Ukraine has and what they do.
Javelin anti-tank guided missiles
What are they for: The anti-tank missiles use infrared systems to lock their targets meaning troops don’t need to aim.
The missile is capable of flying up to 490ft into the air before connecting with a target.
Next Generation Light Anti-tank Weapon
What are they for: This weapon is another anti-tank missile, of which the UK has donated 2,000 units to Ukraine.
It’s capable of flying at speeds of 440 miles per hour using an inertial navigation system to fly to a target vehicle.
Stinger missiles
What are they for: Latvia and Lithuania have donated stinger missiles which is a Man-Portable-Air-Defense System (MANPADS) that uses infrared homing technology to search and strike flying targets.
It’s been used by Ukrainian forces to bring down Russian aircraft.
Bayraktar TB2 drones
What are they for: The drones supplied by Turkey and is capable of 24-hour flights at an altitude of 24,000 feet (7,300 metres) and carrying a payload of 330 lbs (150kg).
It is capable of carrying out aerial strikes against tanks and bunkers, with a maximum altitude of five miles to avoid enemy machine guns.
The drone can also navigate even if it loses GPS signal, however, it’s unclear whether they’ve been used in Ukraine yet.
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