Ukraine says it landed troops on the shores of Russian-occupied Crimea

Ukrainian forces have carried out their most complex and ambitious operations to date against Russian military facilities in the occupied region of Crimea, officials in Kyiv have said.
Special forces landed on the western shore of Crimea, near the settlements of Olenivka and Mayak, in a joint operation with the country’s Navy, according to Ukrainian Defense Intelligence.
“While performing the task, Ukrainian defenders clashed with the occupier’s units. As a result, the enemy suffered losses among its personnel and destroyed enemy equipment,” the intelligence agency said

How will this war end? 

It won’t but neither will staying strictly on the defense. So dividing Putin’s attention, makes sense as a tactic to decrease their own casualties.

I am pretty sure this war can’t end until Putin is dead. It’s his immortality project, to be remembered in history; and he won’t accept defeat to such an extent that he claims his military is so incompetent that his ships sink themselves.