Ukraine is extending its record of flipping the script on Russia through innovation and audacity

• Ukraine took Russia by surprise with an invasion of the Kursk region last week.
• It's not the first time that Ukraine has used surprise and innovation to turn the tables in the war.
• An expert says Ukraine learned bitter lessons from its 2014 war with Russia.

For months, Ukraine had been on the back foot in its war against Russia, with the Kremlin's forces slowly winning control of new territory.

But last week, Ukraine turned the dynamic of the war on its head, launching an audacious incursion into Russia's Kursk province.