Washington Post - Dozens of Insurgents Killed in Iraq Offensive by John Ward Anderson.

U.S. and Iraqi forces continued targeting Sunni insurgents in the city of Baqubah north of Baghdad on Wednesday, the second day of a major new offensive aimed at stamping out the Sunni extremist group al-Qaeda in Iraq.

About 10,000 U.S. and Iraqi troops are participating in the new offensive, called Arrowhead Ripper, which began early Tuesday in Diyala province, a mixed Sunni-Shiite-Kurdish province north and east of Baghdad that, in recent months, has become a stronghold of al-Qaeda in Iraq and the most violent area in the country outside of the capital. Forty-one insurgents and one American soldier were killed in two days of fighting, the U.S. military said Wednesday...
NY Times - Heavy Fighting as U.S. Troops Squeeze Insurgents in Iraq City by Michael Gordon and Alissa Rubin.

Fighting was heavy in parts of Baquba on Wednesday as American troops continued to squeeze a large section of the city in an effort to rid it of insurgents believed to be part of Al Qaeda in Mesopotamia.

Soldiers moved block by block through the city, the capital of Diyala Province, clearing houses and removing roadside bombs. As they pressed in, American troops discovered a medical aid station for insurgents — another sign that the Qaeda fighters had prepared for an intense fight. The hospital, uncovered by troops from the Fifth Battalion, 20th Infantry, was equipped with oxygen tanks, defibrillators, generators and surgical equipment, as well as pieces of insurgent propaganda...
The Fourth Rail - Battle of Iraq 2007 by Bill Roggio.

A look at the largest offensive operation in Iraq since 2003

Four days after the announcement of major offensive combat operations against al Qaeda in Iraq and its allies, the picture becomes clearer on the size and scope of the operation. In today's press briefing, Rear Admiral Mark noted that the ongoing operation is a corps directed and coordinated offensive operation. This is the largest offensive operation since the first phase of Operation Iraqi Freedom ended in the spring of 2003.

The corps level operation is being conducted in three zones in the Baghdad Belts -- Diyala/southern Salahadin, northern Babil province, and eastern Anbar province --- as well as inside Baghdad proper, where clearing operations continue in Sadr City and the Rashid district. Iraqi and Coalition forces are now moving into areas which were ignored in the past and served as safe havens for al Qaeda and Sunni insurgent groups. As the corps level operation is ongoing, Coalition and Iraqi forces are striking at the rogue Iranian backed elements of Muqtada al Sadr's Mahdi Army and continuing the daily intelligence driven raids against al Qaeda's network nationwide...
NY Times - Shiite Rivalries Slash at a Once Calm Iraqi City by Alissa Rubin.

The Shiite heartland of southern Iraq has generally been an oasis of calm in contrast to Baghdad and the central part of the country, but now violence is convulsing this city. Shiites are killing and kidnapping other Shiites, the police force is made up of competing militias and the inner city is a web of impoverished streets where idealized portraits of young men, killed in recent gun battles with Iraqi and American troops, hang from signposts above empty lots.

The unrest in Diwaniya, mirrored in Nasiriya to the south, reflects the emergence of a poisonous political landscape in which competing Shiite groups no longer look to the political system to allocate power. The government’s authority appears to have broken down, with the governor calling this spring for Iraqi Army units, backed by American troops, to restore order. Civilians, not sure where to look for protection, are caught in the deepening fear and uncertainty...