It is difficult to determine an exact response without knowing the exact circumstances and goals of a potential conflict involving Iran, Hezbollah and Hamas. However, it is likely that if direct involvement of these forces in fighting in the Gaza / Israel border region were to take place, it could draw increased American involvement. Due to its close ties with Israel, the US has been supportive of Israel’s efforts to counter foreign interference in the region. The US could likely increase their support for Israel in this scenario with increased diplomatic, economic, or even military involvement. If Iran or Hezbollah were to begin deploying forces or weapons, US forces could become involved in attempting to intercept these deliveries. In general, US involvement could take several forms, depending on what was taking place and the goals of the US.