thereupon

Concerning that matter; upon that.

Directly following that; forthwith.

In consequence of that; therefore.

Upon that.

In consequence of that; by reason of that.

Immediately after that; without delay; in sequence, but not necessarily in consequence.

Upon that or this; thereon.

On account, or in consequence, of that; therefore.

Immediately; at once; without delay.

upon that/it, following that/it