A little over a week ago Ukraine's military began showing off it newly acquired long-rage rocket systems from the US by uploading videos of launches against Russian forces.
Ukraine's Defense Minister Oleksii Reznikov announced last month, "HIMARS have arrived to Ukraine. Thank you to my colleague and friend SecDef Lloyd J. Austin III for these powerful tools! Summer will be hot for Russian occupiers. And the last one for some of them," in reference to the High Mobility Artillery Rocket Systems.
Already, Ukraine's forces and their American backers are touting that they've been able to target and strike Russian command centers with the HIMARS, which are well past the front lines.