Seoul: South Korean President Yoon Suk Yeol's unexpected declaration of martial law has drawn a significant reaction from the United States, as it strives to maintain its longstanding alliance with South Korea. U.S. officials were quick to express their concerns and emphasize the importance of a "peaceful" resolution to the situation.According to Yonhap News Agency, President Yoon's declaration of emergency martial law on Tuesday night prompted Deputy Secretary of State Kurt Campbell to express the U.S.'s "grave concern," while a White House spokesperson noted that Washington was "seriously concerned." This development challenges the Biden administration's efforts to strengthen ties within the South Korea-U.S. alliance, as well as trilateral cooperation with Japan, which has been a cornerstone of its foreign policy.Following the South Korean Cabinet's decision to end martial law, a spokesperson for the U.S. National Security Council (NSC) expressed relief and reiterated the fundamental role democracy play s in the U.S.-ROK partnership. "We are relieved President Yoon has reversed course on his concerning declaration of martial law and respected the ROK National Assembly's vote to end it," the spokesperson stated, highlighting democracy as a core value that unites the two nations.Secretary of State Antony Blinken issued a separate statement, emphasizing the U.S.'s expectation that "political disagreements be resolved peacefully and in accordance with the rule of law." He reaffirmed U.S. support for South Korea and the alliance, which is built on shared democratic principles.In Washington, State Department principal deputy spokesperson Vedant Patel assured the public of the "ironclad" nature of the U.S.-ROK alliance. He expressed hope that any political disputes in South Korea would be resolved peacefully, although he refrained from characterizing the martial law declaration as politically motivated.At the Pentagon, press secretary Maj. Gen. Pat Ryder confirmed that there were no changes in the U.S. Forces Korea's posture following the martial law declaration. He noted that the situation was being closely monitored, but no adjustments in force posture were currently necessary.President Yoon's martial law move was a response to alleged "anti-state" activities by the opposition, which he claimed were hindering government functions. The declaration was short-lived, lasting only about six hours before his Cabinet convened to bring an end to the situation.