Tehilim Yahad is a website people from all over the world can gather to pray tehilim (psalms) together for whatever purpose is given. Here is the specific page to pray for the success and protection for Am Yisrael and the security forces, in case you want to pray with us here in Israel (it's in Hebrew, but you can change the language to any of the major languages, including English). UPDATE: instructions are in the comments below.
I grouped sets of Tehilim here for different aspects of war, especially for the Jewish soldiers who are physically involved, doing the great mitzvah of defending the Jewish country (regardless of how one individually feels about it).
Tizku l' mitzvoth! May haShem save us and all Israel, all over the world in your merit, joined with ours.
And below is some motivation to pray! More links can be added in the comments below.
200 Hamas rockets strike Israel
Some of the story behind what's happening here - BBC - read with caution. As usual they blame us, whether openly or subtly. It's the badly-played opera again.
Arutz 7- IDF given green light in Gaza | IDF strikes Gaza terror targets
Rocket attacks are up to 400 - R' Lazer Brody
Something else we can bring to HQB"H: While Hamas engages us in war, "Under the guise of 'agricultural assistance,' the Palestinian Authority is taking over Area C, with the help of massive European financial support and in violation of the law." Read and/or download this Regavim PDF for more. Regavim holds our government accountable for enforcing laws regarding our land. But now we are besieged on both sides.
Here we go... of course we must pray for the complete redemption!!!
UPDATE 14/11/2018: Last night R' Lazer summed up what I'd like to call Lessons Learned After the Ceasefire (it's really called Iron Dome, Ceasefire: There's no one but Hashem):
Despite everything, Hashem still did tremendous miracles. 450 missiles fell, there was all kinds of chaos and property damage, yet only one person was killed - not even an Israeli - but a worker from the PA village of Halhoul illegally sleeping over in Ashkelon. There were no Jewish Israeli fatalities!"Rabbi Rambo" should know.
Hashem is giving us another chance to learn emuna and do teshuva. Once we do, we're home free. But, if people simply use the respite to go back to their sidewalk cafes, then the next round of hostilities will be even worse. What's more, if Iron Dome's success against Gaza was a mere 27% (flunking Fall Semester midterms against Gaza, 2018), what will it be against Hizbollah, whose firepower is twenty times that of Gaza?
Disclaimer: I'm not a Breslever myself, and don't plan to become one. They don't own emuna and teshuva; they just promote these Jewish concepts with everything they have!