The 501st Legion form a crucial component in the multi-pronged mission to conquer Umbara, and General Krell presses the troops hard to do their part. He will not accept failure, but unlike General Skywalker, Krell does not command his troops from the front-lines.

ARC Trooper Fives thinks General Krell's orders amount to a suicide mission for the 501st troopers, and he's not afraid to say so. Captain Rex reminds Fives that the duty of a clone trooper is to follow orders.

Hardcase barely seems affected by the murmurs of misgivings and doubt spreading through the 501st ranks. He just wants to blast Umbarans.

The 501st are nearly overrun by these powerful centipede-like armored vehicles operated by the Umbarans. The crawler tanks are heavily shielded, and covered with weapons.

General Krell's misguided strategy marches the 501st right into the path of massive Umbaran mobile heavy cannons. These six-legged juggernauts have no apparent weakness.

The Umbaran capital is heavily fortified, and is supplied by a nearby airbase. In order for the Republic to conquer the shadowy world, it must cut this vital supply line.

The high attrition rate of the clone ranks begins to wear on Kix. He is kept far too busy patching up wounded clones due to General Krell's strategies.