Group 1 - The Houthi armed group has conducted drone attacks on military targets in Tel Aviv, Israel, and on multiple U.S. naval vessels, including the USS Harry S. Truman aircraft carrier [1][4][6] - U.S. airstrikes in Yemen have resulted in significant casualties, with reports indicating 3 deaths in Sana'a and 12 deaths, including women and children, in Al Hudaydah [3][4] - Since March 15, U.S. airstrikes have caused 257 casualties in Yemen, including 92 deaths and 165 injuries [7] Group 2 - The U.S. has increased its military presence in the region, deploying the USS Carl Vinson carrier strike group to the Middle East, raising the number of U.S. carrier strike groups in the area to two [9][11] - The U.S. military has expanded its airstrike operations against the Houthi group, with President Trump stating that the campaign will continue for an extended period [6][11] - Iran has condemned the U.S. airstrikes in Yemen, asserting that the Houthi group operates independently and that Iran will respond decisively if threatened [10]