In early 1917, Landis considered leaving the bench and returning to private practice—though he greatly enjoyed being a judge, the salary of $7,500 was considerably lower than what he could make as an attorney. The entry of the United States into World War I in April ended Landis's determination to resign; a firm supporter of the war effort, he felt he could best serve the country by remaining on the bench. Despite this decision and his age, fifty, Landis wrote to Secretary of War Newton D. Baker, asking him to take him into the service and send him to France, where the war was raging. Baker urged Landis to make speeches in support of the war instead, which he did. The judge's son, Reed, had already served briefly in the Illinois National Guard; during the war he became a pilot, and eventually an ace.