He did some more swearing. The barrel wasn't perfectly airtight, and it didn't have proper filters in the ventilation system. That was partly his own fault, too. He'd had a lot to say about the design of barrels. He'd thought about all sorts of things, from the layout of the turret to the shape of the armor and the placement of the engine compartment. Defending against poison gas hadn't once crossed his mind-or, evidently, anyone else's.

"What do we do, sir?" Sergeant Pound asked.

Morrell didn't want to fall back to that prepared position without making the Confederates pay a price. His lips skinned back from his teeth in a fierce grin the gas mask hid. "Forward!" he said, first to Pound, then on the intercom to the driver, and then on the wireless. "Let's see if those bastards want to drop gas on their own men."

The barrel rumbled ahead. Morrell hoped not too much gas was getting into the fighting compartment. He could tell the instant they came out into the sunlight from the shade of the trees. It had been hot in the barrel before. It got a hell of a lot hotter when the sun started beating down on the hull and the turret.

Bullets began hitting the barrel as soon as it came out into the open, too. Morrell didn't worry about ordinary rifle or machine-gun rounds very much, not while he wasn't standing up and looking out through the cupola. (He didn't worry about them while he was, either. Afterwards, sometimes, was a different story.) But the Confederates had the same sort of.50-caliber antibarrel rifles as U.S. troops. Even one of those big armor-piercing bullets wouldn't penetrate the front glacis plate or the turret, but it might punch through the thinner steel on the barrel's sides.

Sergeant Pound and the bow machine gunner, a redheaded mick named Teddy Fitzgerald, opened up on the Confederate soldiers they'd caught in the open. Pound abandoned the turret machine gun after a little while. "H.E.!" he called to Sweeney, who fed a high-explosive round into the cannon. It roared. Through the periscopes, Morrell watched the round burst. A couple of enemy soldiers went flying.

The Confederates didn't put gas down on top of their own men. They didn't break through east of Chillicothe, either. Morrell's barrels gave them a good mauling there. But they did break the U.S. line west of town. Morrell had to fall back or risk being surrounded. Even pulling back wasn't easy. He fought a brisk skirmish at long range with several C.S. barrels. If the Confederates had moved a little faster, they might have trapped him. He hated retreat. But getting cut off would have been worse. So he told himself, over and over again.

As Mary Pomeroy walked to the post office in Rosenfeld, Manitoba, with her son Alexander in tow, she laughed at herself. She'd always thought she couldn't hate anyone worse than the green-gray-clad U.S. soldiers who'd occupied the town since 1914. Now the Yanks, or most of them, were gone, and she discovered she'd been wrong. The soldiers from the Republic of Quebec, whose uniforms were of a cut identical to their U.S. counterparts but sewn from blue-gray cloth, were even worse.

For one thing, the Yanks, however much Mary despised them, had won the war. They'd driven out and beaten the Canadian and British defenders of what had been the Dominion of Canada. If not for them, there wouldn't have been any such thing as the Republic of Quebec. Quebec had been part of Canada for more than 150 years before the Yanks came along. The USA had no business splitting up the country.

For another, hardly any of the Quebecois soldiers spoke more than little fragments of English. You couldn't even try to reason with them, the way you could with the Yanks. Some Yanks-Mary hated to admit it, but knew it was true-were pretty decent, even if they did come from the United States. Maybe some Quebecois were, too. But if you couldn't talk to them, how were you supposed to find out? They jabbered away in their own language, and it wasn't as if Mary or anybody else in Rosenfeld had ever learned much French.

And not only did the men in blue-gray speak French, they acted French. She'd long since got used to the way American soldiers eyed her. They'd done it in spite of her wedding ring, later in spite of little Alec. She was a tall, slim redhead in her early thirties. Men did notice her. She'd grown used to that, even if she didn't care for it.

But the two Quebecois soldiers who walked by her were much more blatant in the way they admired her than the Yanks had been. It wasn't as if they were undressing her with their eyes-more as if they were groping her with them. And when, laughing, the Frenchies talked about it afterwards, she couldn't understand a word they said. By their tone, though, it was all foul and all about her. She looked straight ahead, as if they didn't exist, and kept on walking. They laughed some more at that.

"Are we almost there yet?" Alec asked. He'd be starting kindergarten before long. Mary didn't want to send him to school. The Yanks would fill him full of their lies about the past. But she didn't see what choice she had. She could teach him what he really needed to know at home.

"You know where the post office is," Mary said. "Are we almost there yet?"

"I suppose so," Alec said in a sulky voice. He didn't take naps any more. Mary missed the time when he had, because that had let her get some rest, too. Now she had to be awake whenever he was. But even if he didn't actually take naps any more, there were still days when he needed them. This felt like one of those days.

Mary did her best to pretend it didn't. "Well, then," she said briskly, "you know we cross the street here-and there it is."

There it was, all right: the yellow-brown brick building that had done the job since before the last war. The postmaster was the same, too, though Wilfred Rokeby's hair was white now and had been black in those distant days. Only the flag out front was different. Mary could barely remember the mostly dark blue banner of the Dominion of Canada. Ever since 1914, the Stars and Stripes had fluttered in front of the post office.

Alec swarmed up the stairs. Mary followed, holding down her pleated wool skirt with one hand against a gust of wind. She was damned if she'd give those Frenchies-or anybody else-a free show. She opened the door, the bronze doorknob polished bright by God only knew how many hands. Her son rushed in ahead of her.

Stepping into the post office was like stepping back in time. It was always too warm in there; Wilf Rokeby kept the potbellied stove in one corner glowing red whether he needed to or not. Along with the heat, the spicy smell of the postmaster's hair oil was a link with Mary's childhood. Rokeby still plastered his hair down with the oil and parted it exactly in the middle. Not a single hair was out of place; none would have dared be disorderly.

Rokeby nodded from behind the counter. "Morning, Mrs. Pomeroy," he said. "New notices on the bulletin board. Directions are I should tell everybody who comes in to have a look at 'em, so I'm doing that."

Mary wanted to tell the occupying authorities where to head in. Getting angry at Wilf Rokeby wouldn't do her any good, though, or the Yanks and Frenchies any harm. "Thank you, Mr. Rokeby," she said, and turned toward the cork-surfaced board with its thumbtack holes uncountable.

The notices had headlines in big red letters. One said, NO HARBORING ENEMY AGENTS! It warned that anyone having anything to do with people representing Great Britain, the Confederate States, Japan, or France would be subject to military justice. Mary scowled. She knew what military justice was. In 1916, the Yanks had taken her brother Alexander, for whom Alec was named, and shot him because they claimed he was plotting against them.

NO INTERFERENCE WITH RAILWAY LINES! the other new flyer warned. It said anyone caught trying to sabotage the railroad would face not just military justice but summary military justice. As far as Mary could tell, that meant the Yanks would shoot right away and not bother with even a farce of a trial. The notice was relevant for Rosenfeld. The town would have been only another patch of Manitoban prairie if two train lines hadn't come together there.