[HELP]
Who joined the continental army after Saratoga?

General Horatio Gates, commander of the Northern Department of the Continental Army, is ready with 8,500 men

Explanation:

In the spring of 1777, the British ordered three of their armies to merge in Albany, New York. Only one army, however, commanded by General John Burgoyne, made the final push to its destination. Waiting for them was the heavily-fortified Northern Department of the Continental Army, commanded by General Horatio Gates

HOPE THIS HELPS

the fact that could also be added to column b is that during world war ii, specifically between the years 1941 and 1945, japan expanded its territory towards the indonesian territory in what was known later as part of the "pacific war". in that time, japan could conquer the philipines, singapore,   borneo, central java, malang, cebu, sumatra and various other islands of the area, therefore expanding its territory for a brief period of time.