WAR-REPORT:- The US House of Representatives passed a supplemental appropriations bill on April 20 providing for roughly $60 billion of assistance to Ukraine. The bill must now be passed by the Senate and signed by the president before aid can begin to flow.
These requirements and the logistics of transporting US materiel to the frontline in Ukraine will likely mean that new US assistance will not begin to affect the situation on the front line for several weeks. The frontline situation will therefore likely continue to deteriorate in that time, particularly if Russian forces increase their attacks to take advantage of the limited window before the arrival of new US aid.
Ukrainian forces may suffer additional setbacks in the coming weeks while waiting for US security assistance that will allow Ukraine to stabilize the front, but they will likely be able to blunt the current Russian offensive assuming the resumed US assistance arrives promptly.
The US Senate will reportedly vote on the bill sometime in the coming week. Pentagon Spokesperson Brigadier General Patrick Ryder stated on April 19 that the Pentagon’s robust logistics system will allow the United States to move security assistance within a matter of “days” and that he believes that the United States will be able to “rush the security assistance in volumes” that the United States believes Ukraine will need to be successful. US Assistant Secretary of Defense for International Security Affairs Celeste Wallander reportedly told US lawmakers that the Pentagon would begin moving ammunition, artillery shells, and air defense assets quickly once Congress approves the aid.
US media reported that US officials stated that the US Department of Defense (DoD) has been assembling the first tranche of resumed US security assistance for Ukraine ahead of the vote in the US House of Representatives but noted that the Biden administration has yet to make a final decision on how large the first tranche of aid will be or what it will include.
US officials reportedly stated that the United States will be able to “almost immediately” send certain munitions to Ukraine from US storage facilities in Europe, particularly critically needed 155mm artillery shells and air defense missiles.
The US officials noted that other security assistance will likely take weeks to arrive in Ukraine depending on where it is currently stored. Ukraine has systematically improved its military logistics operations in recent months, but this new system has not yet accommodated a sudden and large influx of materiel, and no system would be able to immediately distribute large quantities of materiel throughout the frontline.
Ukrainian forces will therefore likely continue to face ongoing shortages of artillery ammunition and air defense interceptors in the coming weeks and the corresponding constraints that these shortages are placing on Ukraine’s ability to conduct effective defensive operations.
Ukrainian artillery shortages are letting Russian mechanized forces make marginal tactical gains, and Ukraine’s degraded air defense capabilities are permitting Russian aviation to heavily degrade Ukrainian defenses along the front with glide bomb strikes. Russian forces could continue to leverage these operational advantages in the coming weeks to make further tactical gains and destabilize the Ukrainian defensive line in hopes of achieving operationally significant advances.
ISW continues to assess that material shortages are forcing Ukraine to conserve ammunition and prioritize limited resources to critical sectors of the front, increasing the risk of a Russian breakthrough in other less well-provisioned sectors and making the overall frontline more fragile than the current relatively slow rate of Russian advances suggests.
The threat of an operationally significant Russian advance in the coming weeks remains, although the Ukrainian command may have more latitude to take short-term risks with dwindling supplies to prevent such an advance once it knows that more materiel will be arriving soon.
