Previous Questions [Specific cases, the P.A.Q]

So I was bored and decided to do something useful. Here I'll compile commonly asked questions to be a reference and avoid redundancy. Please do help me with this, I'll be slowly adding onto it. I realize this is similar to the FAQ, but I'd like to have more links eventually and more specific situations than the FAQ needs. I'll be recording questions asked by players with good answers to hopefully fill players in on things that aren't immediately available in the FAQ.

This will be if you may, the PAQ. Yes, P.A.Q. Previously asked questions... Going hand in hand with the Frequently Asked Questions, the PAQ serves as a direct guide to certain questions players have asked with detailed and conclusive answers that go deeper than the FAQ from fellow players.

Common Questions

Game mechanics and gameplay:

Walling:
How to wall
How to stop walls (WFs)
Wall glitching and rewalling
Turnblocking:
How do TBs work
Merging and cancelling moves:
Can't cancel moves
Can't cancel moves
Winning and losing:
How to win
Turn limit ends, but no winner yet
Money:
Running out of money
When is income calculated every turn
List of country's income
Attacking and defending:
Safe attacking ratio of units

Forum and website:

Search and find:
Searching for players

Upgrades, strategies, and units:

Upgrades:
Upgrades priority
Upgrades for a non-premium player
Unlocking other upgrades when buying certain ones
Upgrade effects adding up
Strategy:
How to read opponent's strategy
Best 10k funds Turkey strategy
Which units get unlocked when you pick a strategy
Units:
What is secondary defense

Community and etiquette:

Clans:
Officer powers
Reputation, elo, trophies, and medals:
Reputation

Premium:
Buying premium:
How to buy premium for a friend
Buying AtWar through Steam

Miscellaneous:
How to report someone
Tips for using not using mouse/using trackpad