In electronic warfare, it is unclear whether the US uses signal jammer systems. United States They may be affected by similar functions or EE systems. United States They have been sufficiently hardened to prevent them. Although Hodges has commented on the United States' view of Russia's capabilities in Eastern Europe, the US Army is still. The United States Europe told C4ISRNET that it could not comment because its mission in Ukraine was located in the western part of the country and no personnel had direct access to the situation in the conflict area.