On 7 July 2014, the Israeli army launched a large military operation in the Gaza Strip, codenamed “Protective Edge”, with the stated objective of stopping Palestinian rocket firing at southern Israel and destroying the military infrastructure of Hamas and other armed groups. This development marked the collapse of the Egyptian-brokered ceasefire understanding reached between Israel and Hamas in November 2012, which has been gradually undermined since December 2013. The latest escalation round started in early June, characterized by an intensification of Israeli airstrikes and rockets launched from Gaza at southern Israel.
A. Operation Protective Edge "marked" the collapse of the 2012 understandings. Not, of course, the many rockets fired off in-between or the tunnels we now know were being dug for an eventual invasion of Israel.
B. Ah, but it was undermined. By whom?
C. First there was an Israeli "intensification" and then there is a "launching" of rockets from Gaza. Isn't that sentence structure chronologically wrong?