Oracle is leading efforts in Washington to block Amazon’s Amazon Web Services cloud unit from landing a massive cloud computing contract with the Department of Defense, according to a report from Bloomberg. AWS is widely seen as the leading candidate to win the Pentagon deal, which could reportedly be worth as much as $10 billion over the next decade. Oracle’s protest is unsurprising on many levels. As a distant also-ran in the cloud market, Oracle can ill afford to let AWS land yet a huge contract to further cement its dominance. Oracle has cultivated close ties with the Trump administration and could use this influence to sway lawmakers’ opinions against the Pentagon cloud deal. Microsoft, Dell, Hewlett Packard Enterprise, and IBM are joining Oracle in trying to thwart AWS’ efforts. As for AWS, it has previous experience tangling with IBM, which in 2013 tried unsuccessfully to block a $600 million AWS cloud deal with the Central Intelligence Agency.