 United States sent about 20 ATACMS missiles to Ukraine. The United States has sent about 20 ATACMS missiles to Ukraine. One of the conditions for the delivery is that they will not be used for attacks on Russian territory. The New York Times reported this with reference to two Western officials and a US official. After many reports that a decision had been made to supply the weapons, their delivery was carried out in secrecy, out of concern that they could be attacked by Russia as they were shipped into the country. In addition, Ukraine wanted to try to catch the Russians off guard. Two Western officials said the United States had sent about 20 of the missiles to Ukraine, the publication added. Ukraine used ATACMS missiles to strike two air bases in Russian-occupied territory, according to a US official with knowledge of the matter. According to officials, the ATACMS missiles sent to the Ukrainians are cluster munitions that scatter 950 small bombs that can cause damage over a large area. This type of weapon is banned by an international agreement that the United States is not a party to. It is unclear how much of a difference the missile system will make on the battlefield. Other Western-provided weapons, including tanks, have provided only a marginal advantage in a war that has bogged down for months. And the version of the missile sent by the United States, the last major system Ukraine had sought from the United States, is limited in range. Still, officials said that it was sufficient to reach almost all of the main bases that Russia has used for air support and for supplying their troops in Ukraine. One of the conditions put on the Ukrainians is that the ATACMS may not be used to attack inside Russian territory, one official said, according to the New York Times.