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The West has continued to add vital new weapons to the Ukrainian arsenal as it battles ot overcome the odds in protracted war with Russia. The latest long-range HIMARS artillery could halt latest Russian advances, experts say.

Russia continues to devote enormous resources to its war effort in Ukraine. Some experts say the West needs to inflict more pain on Putin to ensure that economic sanctions take effect. ( Leer en español)

When the fighting is done, vast sums of money will be needed in the future for reparations to rebuild Ukraine and to help ensure its long-term security. So who will pay for that?

With a total of 9,655 sanctions against it, Russia is now the most sanctioned country in the world, ahead of Iran. Of these, 6,901 have been imposed since February. But the high price of oil and gas, ironically a result of the war, is fueling Vladimir Putin's war machine. ( Leer en español)

The war in Ukraine is entering a new phase focused on the east of the country that could determine the outcome of the Russian invasion ordered by President Vladimir Putin. While Russia's war machine still has enormous combat power, it has suffered heavy losses in men and equipment, experts say. (Leer en español)

Security experts and sources in Russia say Putin is left isolated in the Kremlin, relying on his secret service and his bullet-proof ‘Beast from The East’ for protection. ( Leer en español)

For several years, the Ukrainian armed forces conducted training with U.S. Army instructors at the International Peacekeeping Security Centre near Yavoriv in eastern Ukraine. The base was shelled by Russia on 13 March, killing at least 35 people, although there were no U.S. trainers there as they were withdrawn at the end of February. The Ukrainian Air Force also established a special relationship with the California National Guard.

The story of how the Ukrainian military reformed itself after being overrun by Russia in 2014, becoming an effective fighting force in barely eight years. What role did U.S. training and equipment play? ( Leer en español)

The US and its allies are trying to squeeze Putin by going after his super rich oligarchs. While that’s no easy task in today’s complex world of secret accounts, it may curtail ‘Russian influence operations’ in the West. ( Leer en español)

Oil prices are likely to remain high for the rest of this year, but the war in Ukraine could give Biden a patriotic boost.

Ukraine's determined resistance has surprised analysts. Ukrainians have gone from "we can defend Kyiv" to believing they can defeat Putin.

The US and its European allies are sending billions of dollars in weapons to help Ukraine defend itself against invading Russian forces, including surface-to-air and anti-tank missiles, as well as tanks and armed drones.

Chemical weapons? Cyber attacks? Nuclear conflict? Is Putin playing psychological games with the West? These are all question now being asked as the war in Ukraine drags on. ( Watch Univision's coverage of the Ukraine war in Spanish)

"Basically, if Vladimir Putin has his way, Ukraine will not exist as the modern Ukraine of the last 30 years," says Fiona Hill, the foremost U.S. expert on Putin.

From bank accounts to yachts to football clubs, the impact of international sanctions is being felt around the world as the United States and the European Union put the squeeze on Vladimir Putin and the notorious oligarchs who feed off his regime. ( Leer en español)