The U.S. is preparing to send Ukraine an additional $725 million in military assistance, including counter-drone systems and munitions for its High Mobility Artillery Rocket System, which could indicate more of the longer-range missiles are headed to the battlefield. Two U.S. officials did not confirm whether the munitions for the HIMARS are the coveted ATACMS — the Army Tactical Missile System — but Ukraine has been pressing for more of the longer-range missiles to strike additional targets inside Russia. The package also includes more anti-personnel landmines that Ukraine is counting on to slow Russian and North Korean ground forces in...