Baquba, the largest city in Diyala province, is about 60 kilometers (37 miles) north of Baghdad.
The operation, Lightning Hammer II, is an extension of an earlier operation in Diyala province.
Hadida is in Diyala province, near the city of Baquba, once an insurgent stronghold.
Especially in the mixed-sect province of Diyala, grumbling among the Sahwa-supporting sheikhs may be rising.
One police officer and 13 other people wounded in two separate attacks in the northeastern Diyala province.
John "Mick" Bednarek, part of Task Force Lightning in Diyala province, one of the war's major battlegrounds.
Consider Salim Khan, a dishwasher at a forward operating base in the volatile Iraqi province of Diyala.
More than 51 percent of the voters Diyala province, which has a slight Sunni majority, favored the constitution.
But a U.S. general in Diyala has recently raised concerns about the strength and capability of those Iraqi forces.
On April 7, 2003, Mr. Welch's battalion was outside Baghdad, pounding Iraqi positions and waiting to attack across the Diyala bridge.
And now it appears as if most of the deadliest attacks are happening in the province north of Baghdad, Diyala province.
His 23-year-old sister, Katie, goes online to find a short military video produced in Balad Ruz, a small village in Diyala province.
So far this year, 100 U.S. service members have died in Diyala.
Iraqi and U.S. troops have been fighting militants in Diyala province, which stretches north and east of the capital and borders Iran.
The attack took place on a U.S. patrol base at an Iraqi school near the town of Baquba in Diyala province, northeast of Baghdad.
Baquba is north of Baghdad, in Diyala province, which borders Iran.
Twenty American service members were killed in Diyala Province last year.
The military said the operation "follows Lightning Hammer I ... to deny al Qaeda safe haven in the provinces" of Salaheddin, Nineveh, Diyala, and Kirkuk.
Mike Garcia, spokesman for the coalition forces responsible for Diyala province.
Also Sunday, in Iraq's Diyala province, at least four people were killed and 17 others wounded in several attacks, a security official in the province said.
U.S. and Iraqi troops have been fighting insurgents in Operation Arrowhead Ripper in and around Baquba, the capital of Diyala -- the eastern province northeast of Baghdad.
Officials said more than 51 percent of the voters in Sunni-dominated Diyala province cast votes for the new law and more than 48 percent voted against it.
Sunni lawmaker Mohammed al-Khaldi from the opposition Iraqiya bloc said he received complaints from voters in Baghdad and in Diyala province about missing names on voting rolls as well.
The Interior Ministry official said the 10 trucks were carrying the barriers to schools that will be turned into polling stations in the Diyala provincial capital of Baquba.
CNN: Driver killed in Iraqi truck blasts as provincial elections near
The military said the original Operation Lightning Hammer -- August 13 to September 1 -- ousted militants from the Diyala River valley, northeast of Baquba, the capital of Diyala province.
"The surge has in some ways contributed to more violence in Diyala and more problems there, " said Amit Paley, a reporter for the Washington Post reporter, who was embedded there last week.
Abbas Farhan al-Jabouri of the Development and National Reform list and two election workers were found shot dead in the Diyala province city of Mandali a few hours after they were kidnapped, police said.
The Iraqi Islamic Party also took the diverse northeastern province of Diyala, with 21.1 percent of the vote, and the Kurdish Alliance took 17 percent there, one of the few provinces where Kurds turned out.
CNN: Iraqi leader's coalition appears to win big in elections
Mr. Hashemi had backed efforts by the leaderships of two provinces, Salahuddin and Diyala, to set up semiautonomous regions, a process authorized by Iraq's constitution and exemplified by the relative peace and prosperity of the Kurdish region.
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