 Complete the following phrase:  Halleck established an uncomfortable relationship with the man who would become his most successful subordinate and future commander, Brig. Gen. Ulysses S. Grant. The pugnacious Grant had just completed the minor, but bloody, Battle of Belmont and had ambitious plans for amphibious operations on the Tennessee and Cumberland Rivers. Halleck, by nature a cautious general, but also judging that Grants reputation for alcoholism in the prewar period made him unreliable, rejected Grants plans. However, under pressure from President Lincoln to take offensive action, Halleck reconsidered and Grant conducted operations with naval and land forces against Forts Henry and 