He also served as commander of several Army medical units.

Between 1942 and 1944 he served as commander of the 9th Corps.

He served as commander in chief of the Egyptian army.

He later served as commander for all the county militia.

Gregory served as commander of the Station for one year.

From 1938 to 1940 he served as commander of the 15th infantry Brigade.

From 1042 to 1057, he served as commander of the field army in Anatolia.

He served as the organization's commander until May 2008.

Between 1910 and 1912 he also served as commander of the 1st infantry regiment.

He had also served as commander of southern forces during Afghanistan's communist era.