I want to know the answer to the following question:
Who tried to invade Egypt in the famous line-in-the-sand incident?
All the background I'm provided with is that "Eventually, instability in the near east resulting from the power vacuum left by the collapse of the Seleucid empire caused the Roman proconsul Pompey the Great to abolish the Seleucid rump state, absorbing much of Syria into the Roman republic.". Is that enough to answer the question?