WASHINGTON — U.S. Army leaders are expected to fire or suspend a “significant number” of officers and enlisted soldiers at Fort Hood, Texas, in a dramatic purge to correct a command culture they believe failed to address leadership failures and a pattern of violence that included murders, sexual assaults and suicides, U.S. officials said Monday.

According to officials familiar with the matter, Army Secretary Ryan McCarthy will take administrative action that will remove soldiers from their jobs, and likely trigger investigations that could lead to a wide range of punishments. Those punishments could go from a simple letter of reprimand to a military discharge. The officials spoke on condition of anonymity to discuss results of an internal review not yet made public.

McCarthy and other senior Army leaders are expected to announce the results of the review on Tuesday. In recent months, they have questioned whether there is a toxic environment at the base, and pledged to hold leaders accountable.

Officials say they expect that Army Lt. Gen. Pat White, the base commander, will not face any administrative action. He was deployed to Iraq as the commander there for much of the year. Others who could face discipline, however, include Army Maj. Gen. Scott Efflandt, who was left in charge of the base earlier this year when Spc. Vanessa Guillen went missing and was found slain two months later.