By Dan Peleschuk KYIV, April 30 (Reuters) - Ukraine's top general on Thursday ordered a mandatory two-month time limit for front-line troops serving in forward positions, aiming to address a key challenge for Kyiv's outmanned military in the fifth year of war with Moscow.

Ukraine's top general on Thursday ordered a mandatory two-month time limit for ‌front-line troops serving in forward positions, aiming to ‌address a key challenge for Kyiv's outmanned military in the fifth year ​of war with Moscow.

After a stray cat and dog became stranded at a frontline position, Ukrainian soldiers flew them out using a drone. They’re not the only animals to have been rescued.

The roots of Russia's invasion of Ukraine go back decades and run deep. The current conflict is more than one country taking over another; it is — in the words of one U.S. official — a shift in "the world order.

Ukraine ​launched a wave of drone attacks on targets across Russia on Sunday, hitting the Baltic Sea ‌port of Primorsk and setting it on fire, and striking a number of vessels, as it steps up attacks on energy infrastructure and other targets.

Ukraine’s military is increasingly using robots to replace human soldiers, even in combat assault missions, helping to counter Russia’s manpower advantage.